Hormones Revision
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This document discusses reproductive hormones in humans and plants. It explains that in humans, the pituitary gland releases FSH and LH, which stimulate egg maturation and ovulation. Estrogen thickens the uterine lining and progesterone prepares the uterus for pregnancy. The document also discusses plant hormones like auxin, and how tropisms allow plants to grow towards light and water through processes like phototropism and geotropism. Homeostasis in humans maintains temperature, glucose, water, and ion levels through mechanisms controlled by the brain, pancreas, and blood vessel dilation and constriction.
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C.1 menstrual cycle
The menstrual cycle is controlled by hormones from the pituitary gland and ovaries. It aims to release an egg once a month to allow for potential fertilization and pregnancy. The cycle involves three phases - the menstrual, proliferative, and secretory phases. Estrogen stimulates growth of the uterine lining during the proliferative phase, while progesterone maintains the lining during the secretory phase in preparation for potential implantation. If implantation does not occur, progesterone and estrogen levels fall, causing the uterine lining to shed and result in menstruation, restarting the cycle.
Hormones in the menstrual cycle
The pituitary gland secretes FSH at the start of the menstrual cycle, causing the ovary to develop an egg and release estrogen. Estrogen inhibits further FSH production and stimulates the release of LH from the pituitary gland. LH causes ovulation and the release of progesterone, thickening the lining of the uterus.
menstrual cycle
The menstrual cycle typically occurs every 28 days and has 4 phases regulated by the hypothalamus, pituitary gland, and ovaries. The follicular phase begins with low estrogen and involves follicle development stimulated by FSH and LH. Ovulation occurs around day 14 when an egg is released from the follicle. In the luteal phase, the empty follicle becomes the corpus luteum and secretes estrogen and progesterone to thicken the uterine lining. If no embryo implants, progesterone levels drop and menstruation begins, shedding the lining. Abnormal uterine bleeding refers to bleeding outside of normal parameters for duration, flow, or frequency.
Menstrual cycle
The female reproductive cycle involves cyclical changes in the ovaries and uterus controlled by hormones. Each cycle typically lasts around 28 days and consists of four phases: the menstrual phase where the uterus sheds its lining if ovulation did not occur; the preovulatory phase where a follicle matures and estrogen levels rise; ovulation of the follicle on around day 14; and the postovulatory phase where the corpus luteum forms and secretes progesterone to thicken the uterine lining to prepare for potential implantation if fertilization occurs. If no fertilization, the corpus luteum regresses and menstruation begins, starting a new cycle.
The menstrual cycle
The menstrual cycle is the series of changes that occur in a woman's reproductive system in preparation for pregnancy. It is controlled by hormones and typically lasts around 28 days, though the length can vary. The cycle involves three phases - the menstrual, proliferative, and secretory phases. During ovulation, an egg is released from the ovaries if pregnancy does not occur. The cycle then repeats each month until menopause, which usually occurs between ages 45-55.
The normal menstrual cycle
The normal menstrual cycle involves hormonal signaling between the hypothalamus, pituitary gland, and ovaries. During the follicular phase, FSH causes follicles to mature and produce estrogen in the ovaries. Rising estrogen triggers a LH surge, causing ovulation. After ovulation, the corpus luteum forms and produces progesterone, which prepares the endometrium for potential implantation during the luteal phase. If implantation does not occur, falling progesterone triggers menstruation and shedding of the endometrial lining. This begins a new cycle.
Physiology of menstruation by av sharma
The document summarizes the physiology of menstruation. It describes the hypothalamic-pituitary-ovarian axis that regulates the menstrual cycle. The cycle consists of two concurrent cycles - the ovarian cycle and the uterine cycle. The ovarian cycle includes the follicular phase where a follicle is selected for ovulation, and the luteal phase where the corpus luteum forms. The uterine cycle includes the proliferative phase where the endometrium thickens in response to estrogen, and the secretory phase where it is remodeled by progesterone in preparation for implantation. If implantation does not occur, hormone levels drop and the endometrium breaks down and is shed, resulting in menstruation.
Understanding Menstrual Cycle
The menstrual cycle is a term used to describe monthly events that occur within a woman's body in preparation for the possibility of pregnancy.
Each month, an egg is released from an ovary in a process called ovulation.
At the same time, the lining of the uterus thickens, ready for pregnancy.
If fertilization does not take place, the lining of the uterus is shed in menstrual bleeding and the cycle starts over.
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C.1 menstrual cycle
The menstrual cycle is controlled by hormones from the pituitary gland and ovaries. It aims to release an egg once a month to allow for potential fertilization and pregnancy. The cycle involves three phases - the menstrual, proliferative, and secretory phases. Estrogen stimulates growth of the uterine lining during the proliferative phase, while progesterone maintains the lining during the secretory phase in preparation for potential implantation. If implantation does not occur, progesterone and estrogen levels fall, causing the uterine lining to shed and result in menstruation, restarting the cycle.
Hormones in the menstrual cycle
The pituitary gland secretes FSH at the start of the menstrual cycle, causing the ovary to develop an egg and release estrogen. Estrogen inhibits further FSH production and stimulates the release of LH from the pituitary gland. LH causes ovulation and the release of progesterone, thickening the lining of the uterus.
menstrual cycle
The menstrual cycle typically occurs every 28 days and has 4 phases regulated by the hypothalamus, pituitary gland, and ovaries. The follicular phase begins with low estrogen and involves follicle development stimulated by FSH and LH. Ovulation occurs around day 14 when an egg is released from the follicle. In the luteal phase, the empty follicle becomes the corpus luteum and secretes estrogen and progesterone to thicken the uterine lining. If no embryo implants, progesterone levels drop and menstruation begins, shedding the lining. Abnormal uterine bleeding refers to bleeding outside of normal parameters for duration, flow, or frequency.
Menstrual cycle
The female reproductive cycle involves cyclical changes in the ovaries and uterus controlled by hormones. Each cycle typically lasts around 28 days and consists of four phases: the menstrual phase where the uterus sheds its lining if ovulation did not occur; the preovulatory phase where a follicle matures and estrogen levels rise; ovulation of the follicle on around day 14; and the postovulatory phase where the corpus luteum forms and secretes progesterone to thicken the uterine lining to prepare for potential implantation if fertilization occurs. If no fertilization, the corpus luteum regresses and menstruation begins, starting a new cycle.
The menstrual cycle
The menstrual cycle is the series of changes that occur in a woman's reproductive system in preparation for pregnancy. It is controlled by hormones and typically lasts around 28 days, though the length can vary. The cycle involves three phases - the menstrual, proliferative, and secretory phases. During ovulation, an egg is released from the ovaries if pregnancy does not occur. The cycle then repeats each month until menopause, which usually occurs between ages 45-55.
The normal menstrual cycle
The normal menstrual cycle involves hormonal signaling between the hypothalamus, pituitary gland, and ovaries. During the follicular phase, FSH causes follicles to mature and produce estrogen in the ovaries. Rising estrogen triggers a LH surge, causing ovulation. After ovulation, the corpus luteum forms and produces progesterone, which prepares the endometrium for potential implantation during the luteal phase. If implantation does not occur, falling progesterone triggers menstruation and shedding of the endometrial lining. This begins a new cycle.
Physiology of menstruation by av sharma
The document summarizes the physiology of menstruation. It describes the hypothalamic-pituitary-ovarian axis that regulates the menstrual cycle. The cycle consists of two concurrent cycles - the ovarian cycle and the uterine cycle. The ovarian cycle includes the follicular phase where a follicle is selected for ovulation, and the luteal phase where the corpus luteum forms. The uterine cycle includes the proliferative phase where the endometrium thickens in response to estrogen, and the secretory phase where it is remodeled by progesterone in preparation for implantation. If implantation does not occur, hormone levels drop and the endometrium breaks down and is shed, resulting in menstruation.
Understanding Menstrual Cycle
The menstrual cycle is a term used to describe monthly events that occur within a woman's body in preparation for the possibility of pregnancy.
Each month, an egg is released from an ovary in a process called ovulation.
At the same time, the lining of the uterus thickens, ready for pregnancy.
If fertilization does not take place, the lining of the uterus is shed in menstrual bleeding and the cycle starts over.
Female reproductive hormones
The female reproductive system undergoes a monthly cycle of maturation and release of eggs, regulated by hormones. During ovulation, a mature egg is released from the ovaries and travels to the uterus. If the egg is not fertilized, hormone levels fall and the thickened uterine lining is shed through menstruation, starting a new cycle. Key hormones like estrogen, progesterone, FSH and LH fluctuate according to negative feedback loops to control follicle development, ovulation, and the preparation of the uterus for potential pregnancy each month until menopause.
Physiology of Menstruation
The document summarizes the physiology of menstruation, including the hormonal interactions between the hypothalamus, pituitary gland, and ovaries that regulate the menstrual cycle. It describes the follicular phase of follicle development and selection of the dominant follicle, ovulation, and the luteal phase when the corpus luteum forms and produces progesterone. It also discusses changes in the endometrium across the menstrual cycle in response to rising and falling hormone levels.
Menstruation in humans
The menstrual cycle occurs in four stages and is controlled by hormones from the pituitary gland and ovaries. In the first follicle stage, follicle stimulating hormone causes a follicle to form and produce estrogen. In the second ovulation stage, the estrogen surge causes luteinizing hormone to be released from the pituitary, rupturing the follicle and releasing an egg. In the third corpus luteum stage, the ruptured follicle forms the corpus luteum which produces progesterone. If no pregnancy occurs, the corpus luteum decomposes in the fourth menstruation stage, dropping hormone levels and causing the uterine lining to shed and be released.
Menstrual Cycle
The menstrual cycle involves changes in the ovaries and uterus driven by hormones. It begins at menarche and typically repeats every 21-35 days until menopause. Each cycle can be divided into the follicular phase, ovulation, and luteal phase. During the follicular phase, FSH stimulates follicle growth and estrogen production. Ovulation occurs when an LH surge causes an egg to be released. In the luteal phase, the corpus luteum produces progesterone to thicken the uterine lining if implantation occurs. If not, progesterone levels drop and menstruation begins, restarting the cycle.
The menstrual cycle- Mr. panneh
this lecture was presented to the December 2016 Midwifery class of the school for Enrolled Nurses and Midwives- The Gambia.
Physiology of menstruation
The physiology of menstruation involves cyclic changes in the hypothalamus, pituitary gland, ovaries, and endometrium that are regulated by hormones. The hypothalamus secretes GnRH which stimulates the pituitary to release FSH and LH. FSH causes follicles to mature in the ovaries during the follicular phase. Rising estrogen levels cause LH and FSH levels to decrease through negative feedback. Near ovulation, estrogen peaks and causes a surge in LH which triggers ovulation. In the luteal phase, the corpus luteum forms and secretes progesterone and estrogen. If pregnancy does not occur, progesterone and estrogen levels drop, causing the thickened endometrium to shed and menstruation
Menstrual cycle
The menstrual cycle is the process in which females ripen and release one mature egg each month under control of the endocrine system. The average cycle is 28 days long and includes the menstrual, proliferative, ovulatory, and secretory phases. During ovulation, a mature egg is released from the ovaries. If the egg is not fertilized, menstrual bleeding occurs and the cycle repeats. The cycle allows for reproduction and continues monthly from menarche to menopause unless interrupted by pregnancy.
Physiology of menstrual cycle
The document discusses the menstrual cycle and menstruation. It defines menstruation as the shedding of the uterine lining every month. It describes the typical phases of the menstrual cycle - the menstrual, follicular, ovulatory, and luteal phases. It explains the hormonal changes and events that occur in the ovaries and uterus during each phase, including ovulation and development of the corpus luteum. It also discusses cervical mucus changes and common abnormalities like menorrhagia. The document provides information on managing menstruation and maintaining hygiene.
Menstrual cycle
The menstrual cycle has four phases and is controlled by hormones from the hypothalamus and pituitary glands. The average cycle is 28 days long. It begins with menstruation where the uterine lining is shed. Next is the follicular phase where an egg is selected and matured. Ovulation then occurs around day 14 when the egg is released. Finally, the luteal phase follows where the corpus luteum forms and progesterone is produced in preparation for potential pregnancy.
Menstrual cycle
DEFINITION OR MEANING OF MENSTRUAL (REPRODUCTIVE) CYCLE:-
Menstruation (Greek word, men-month) is monthly uterine bleeding out flowing through vagina into vulva for 4-5 days every 28 days (24-35 days)during reproductive life of a woman from menarche to menopause.
The Menstrual cycle of 28 days starts on day of onset of menstruation and ends at day 28 on start of next mens.
The cycle consists of a series of changes taking place concurrently in the ovaries and uterine lining, stimulated by changes in blood concentration of hormones.
02 Roles of Hormones in the Menstrual Cycle
This document summarizes the hormonal control of gametogenesis in males and females. It explains that the hypothalamus and pituitary gland control the process by secreting gonadotrophic hormones like follicle stimulating hormone (FSH) and luteinizing hormone (LH) in response to gonadotropin-releasing hormone (GnRH). In females, it describes the menstrual cycle process where FSH and LH stimulate egg production and uterine thickening in response to estrogen and progesterone levels throughout the cycle.
Roles of hormones in menstrual cycle
The menstrual cycle involves changes in hormone levels over three stages. In the first stage (days 1-5), FSH increases and the endometrium breaks down, resulting in menstruation. In the second stage (days 6-14), FSH and estrogen rise, stimulating follicle development and an LH surge causes ovulation on day 14. In the final stage (days 14-28), progesterone rises, maintaining the thickened endometrium to prepare for implantation. If implantation does not occur, progesterone falls and menstruation begins again.
Hormones & Reproduction
Hormones are chemical messengers released by endocrine glands that cause changes in other parts of the body. The endocrine system works with the nervous system to maintain homeostasis through negative feedback loops. Key glands include the pituitary, thyroid, pancreas, ovaries and testes. Hormones regulate important bodily functions like growth, reproduction, metabolism, and temperature control.
The ovarian cycle
The menstrual cycle is governed by hormonal changes and can be divided into the ovarian cycle and uterine cycle. The ovarian cycle consists of the follicular phase where follicles mature, ovulation when an egg is released, and the luteal phase where the corpus luteum forms. The uterine cycle involves menstruation, the proliferative phase where the lining grows, and the secretory phase where the lining thickens in preparation for pregnancy under progesterone influence. These cycles allow for reproduction and are a natural part of female reproductive health.
The menstrual cycle IGCSE + SPM
The menstrual cycle involves changes in the ovaries and uterus lining controlled by hormones. The pituitary gland releases FSH and LH, stimulating egg development and the production of estrogen and progesterone by the ovaries. Estrogen builds the uterine lining while progesterone maintains it. Around day 14, a surge in LH triggers ovulation. If fertilization does not occur, progesterone and estrogen levels fall, causing the uterine lining to shed through menstruation and initiating a new cycle.
Neuro-Endocrinal regulation of Menstrual cycle
The document discusses the neuroendocrine regulation of the menstrual cycle, which is a complex genetically determined system involving the genitals, central nervous system, and target organs. It describes the 5 levels of regulation, including the target organs, ovaries, hypophysis, hypothalamus, and extra-hypothalamic structures. The hormones involved and their effects on the female reproductive system and other organs are also outlined. The activation and regulation of the hypothalamic-pituitary-ovarian axis at the start of puberty that leads to the initiation of menstrual cycles is briefly explained.
Physiology of menstruation - Female Reproductive System - B.Pharm & Pharm.D -...
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This document discusses the physiology of menstruation. It begins with an overview of menstruation and notes that it involves periodic physiological changes in females from puberty until menopause. It then outlines the four phases of the menstrual cycle: the menstrual phase involving bleeding, the follicular phase where the uterus lining thickens, ovulation where an egg is released, and the luteal phase where the corpus luteum forms. Each phase is described in 1-2 sentences with key details.The menstrual cycle
The menstrual cycle is controlled by hormones like FSH, LH, estrogen, and progesterone. It begins at menarche and ends at menopause. During each cycle, an egg matures and is released during ovulation around day 14. If the egg is not fertilized, hormone levels fall and the uterine lining sheds as menstruation over around 3-8 days. Menstrual cramps are caused by prostaglandins released during this shedding process, which cause uterine contractions.
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The female reproductive system undergoes a monthly cycle of maturation and release of eggs, regulated by hormones. During ovulation, a mature egg is released from the ovaries and travels to the uterus. If the egg is not fertilized, hormone levels fall and the thickened uterine lining is shed through menstruation, starting a new cycle. Key hormones like estrogen, progesterone, FSH and LH fluctuate according to negative feedback loops to control follicle development, ovulation, and the preparation of the uterus for potential pregnancy each month until menopause.
Physiology of Menstruation
The document summarizes the physiology of menstruation, including the hormonal interactions between the hypothalamus, pituitary gland, and ovaries that regulate the menstrual cycle. It describes the follicular phase of follicle development and selection of the dominant follicle, ovulation, and the luteal phase when the corpus luteum forms and produces progesterone. It also discusses changes in the endometrium across the menstrual cycle in response to rising and falling hormone levels.
Menstruation in humans
The menstrual cycle occurs in four stages and is controlled by hormones from the pituitary gland and ovaries. In the first follicle stage, follicle stimulating hormone causes a follicle to form and produce estrogen. In the second ovulation stage, the estrogen surge causes luteinizing hormone to be released from the pituitary, rupturing the follicle and releasing an egg. In the third corpus luteum stage, the ruptured follicle forms the corpus luteum which produces progesterone. If no pregnancy occurs, the corpus luteum decomposes in the fourth menstruation stage, dropping hormone levels and causing the uterine lining to shed and be released.
Menstrual Cycle
The menstrual cycle involves changes in the ovaries and uterus driven by hormones. It begins at menarche and typically repeats every 21-35 days until menopause. Each cycle can be divided into the follicular phase, ovulation, and luteal phase. During the follicular phase, FSH stimulates follicle growth and estrogen production. Ovulation occurs when an LH surge causes an egg to be released. In the luteal phase, the corpus luteum produces progesterone to thicken the uterine lining if implantation occurs. If not, progesterone levels drop and menstruation begins, restarting the cycle.
The menstrual cycle- Mr. panneh
this lecture was presented to the December 2016 Midwifery class of the school for Enrolled Nurses and Midwives- The Gambia.
Physiology of menstruation
The physiology of menstruation involves cyclic changes in the hypothalamus, pituitary gland, ovaries, and endometrium that are regulated by hormones. The hypothalamus secretes GnRH which stimulates the pituitary to release FSH and LH. FSH causes follicles to mature in the ovaries during the follicular phase. Rising estrogen levels cause LH and FSH levels to decrease through negative feedback. Near ovulation, estrogen peaks and causes a surge in LH which triggers ovulation. In the luteal phase, the corpus luteum forms and secretes progesterone and estrogen. If pregnancy does not occur, progesterone and estrogen levels drop, causing the thickened endometrium to shed and menstruation
Menstrual cycle
The menstrual cycle is the process in which females ripen and release one mature egg each month under control of the endocrine system. The average cycle is 28 days long and includes the menstrual, proliferative, ovulatory, and secretory phases. During ovulation, a mature egg is released from the ovaries. If the egg is not fertilized, menstrual bleeding occurs and the cycle repeats. The cycle allows for reproduction and continues monthly from menarche to menopause unless interrupted by pregnancy.
Physiology of menstrual cycle
The document discusses the menstrual cycle and menstruation. It defines menstruation as the shedding of the uterine lining every month. It describes the typical phases of the menstrual cycle - the menstrual, follicular, ovulatory, and luteal phases. It explains the hormonal changes and events that occur in the ovaries and uterus during each phase, including ovulation and development of the corpus luteum. It also discusses cervical mucus changes and common abnormalities like menorrhagia. The document provides information on managing menstruation and maintaining hygiene.
Menstrual cycle
The menstrual cycle has four phases and is controlled by hormones from the hypothalamus and pituitary glands. The average cycle is 28 days long. It begins with menstruation where the uterine lining is shed. Next is the follicular phase where an egg is selected and matured. Ovulation then occurs around day 14 when the egg is released. Finally, the luteal phase follows where the corpus luteum forms and progesterone is produced in preparation for potential pregnancy.
Menstrual cycle
DEFINITION OR MEANING OF MENSTRUAL (REPRODUCTIVE) CYCLE:-
Menstruation (Greek word, men-month) is monthly uterine bleeding out flowing through vagina into vulva for 4-5 days every 28 days (24-35 days)during reproductive life of a woman from menarche to menopause.
The Menstrual cycle of 28 days starts on day of onset of menstruation and ends at day 28 on start of next mens.
The cycle consists of a series of changes taking place concurrently in the ovaries and uterine lining, stimulated by changes in blood concentration of hormones.
02 Roles of Hormones in the Menstrual Cycle
This document summarizes the hormonal control of gametogenesis in males and females. It explains that the hypothalamus and pituitary gland control the process by secreting gonadotrophic hormones like follicle stimulating hormone (FSH) and luteinizing hormone (LH) in response to gonadotropin-releasing hormone (GnRH). In females, it describes the menstrual cycle process where FSH and LH stimulate egg production and uterine thickening in response to estrogen and progesterone levels throughout the cycle.
Roles of hormones in menstrual cycle
The menstrual cycle involves changes in hormone levels over three stages. In the first stage (days 1-5), FSH increases and the endometrium breaks down, resulting in menstruation. In the second stage (days 6-14), FSH and estrogen rise, stimulating follicle development and an LH surge causes ovulation on day 14. In the final stage (days 14-28), progesterone rises, maintaining the thickened endometrium to prepare for implantation. If implantation does not occur, progesterone falls and menstruation begins again.
Hormones & Reproduction
Hormones are chemical messengers released by endocrine glands that cause changes in other parts of the body. The endocrine system works with the nervous system to maintain homeostasis through negative feedback loops. Key glands include the pituitary, thyroid, pancreas, ovaries and testes. Hormones regulate important bodily functions like growth, reproduction, metabolism, and temperature control.
The ovarian cycle
The menstrual cycle is governed by hormonal changes and can be divided into the ovarian cycle and uterine cycle. The ovarian cycle consists of the follicular phase where follicles mature, ovulation when an egg is released, and the luteal phase where the corpus luteum forms. The uterine cycle involves menstruation, the proliferative phase where the lining grows, and the secretory phase where the lining thickens in preparation for pregnancy under progesterone influence. These cycles allow for reproduction and are a natural part of female reproductive health.
The menstrual cycle IGCSE + SPM
The menstrual cycle involves changes in the ovaries and uterus lining controlled by hormones. The pituitary gland releases FSH and LH, stimulating egg development and the production of estrogen and progesterone by the ovaries. Estrogen builds the uterine lining while progesterone maintains it. Around day 14, a surge in LH triggers ovulation. If fertilization does not occur, progesterone and estrogen levels fall, causing the uterine lining to shed through menstruation and initiating a new cycle.
Neuro-Endocrinal regulation of Menstrual cycle
The document discusses the neuroendocrine regulation of the menstrual cycle, which is a complex genetically determined system involving the genitals, central nervous system, and target organs. It describes the 5 levels of regulation, including the target organs, ovaries, hypophysis, hypothalamus, and extra-hypothalamic structures. The hormones involved and their effects on the female reproductive system and other organs are also outlined. The activation and regulation of the hypothalamic-pituitary-ovarian axis at the start of puberty that leads to the initiation of menstrual cycles is briefly explained.
Physiology of menstruation - Female Reproductive System - B.Pharm & Pharm.D -...
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The menstrual cycle is controlled by hormones like FSH, LH, estrogen, and progesterone. It begins at menarche and ends at menopause. During each cycle, an egg matures and is released during ovulation around day 14. If the egg is not fertilized, hormone levels fall and the uterine lining sheds as menstruation over around 3-8 days. Menstrual cramps are caused by prostaglandins released during this shedding process, which cause uterine contractions.
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For students With thanks to the TES biologist from whom this was adapted and originally came up with this excellent presentation.
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Pituitary gland
The document discusses the endocrine system and pituitary gland. It defines the endocrine system as a group of glands that secrete hormones directly into the bloodstream to regulate organ and cell activity. The pituitary gland, also called the "master gland", is a pea-sized gland located in the brain that controls the function of other glands. The pituitary gland is divided into the anterior and posterior pituitary. The anterior pituitary secretes hormones like growth hormone, TSH, and prolactin, while the posterior pituitary secretes oxytocin and vasopressin (ADH). The document provides details on the functions of these hormones and conditions related to hormone imbalances.
Reproductive System
The male reproductive system produces sperm in the testes and transports it through the vas deferens. During ejaculation, sperm is mixed with fluids from the seminal vesicles, prostate, and bulbourethral glands to form semen. In females, eggs mature in ovarian follicles and are released during ovulation. If fertilization occurs, the corpus luteum forms and secretes progesterone and estrogen to support an early pregnancy.
discussion on the endocrine system for science grade10.pptx
The endocrine system is made up of glands that produce hormones to regulate vital body functions. The major glands include the pituitary gland, thyroid gland, parathyroid glands, adrenal glands, pancreas, and reproductive glands. The pituitary gland is referred to as the "master gland" and produces hormones that control other glands and regulate growth, metabolism, reproduction and lactation. Other glands and their key hormones include the thyroid (thyroxine), parathyroid (parathyroid hormone), adrenals (adrenaline), pancreas (insulin and glucagon), ovaries (estrogen and progesterone) and testes (testosterone and androgen). The endocrine system maintains homeostasis through
PITUITARY GLAND,LOBES,FUNCTIONS,ABNORMALITIES AND NORMAL RANGES.pptx
Pituitary gland, also called hypophysis, ductless gland of the endocrine system that secretes hormones directly into the bloodstream.
The pituitary gland is a small pea-sized gland that is situated in the basal part of the brain below the hypothalamus and above the nasal passage.
The term hypophysis (from the greek for “lying under”)—another name for the pituitary—refers to the gland’s position on the underside of the brain.
The pituitary gland is called the “master gland” because its hormones regulate other important endocrine glands—including the adrenal, thyroid, and reproductive glands (e.G., Ovaries and testes)
The pituitary gland lies at the middle of the base of the skull and is housed within a bony structure called the sella turcica, which is behind the nose and immediately beneath the hypothalamus.
The pituitary gland is attached to the hypothalamus by a stalk composed of neuronal axons.
Its weight in normal adult humans ranges from about 500 to 900 mg (0.02 to 0.03 ounce).
Adenohyphophysis: - Anterior lobe. It is influenced by
hormones which come from the hypothalamus.
Neurohypophysis: - Posterior lobe. It is influenced by neurons which convey hormones directly from hypothalamic nuclei for storage of posterior lobe.
Intermediate lobe:-pars intermedia
The cells of the anterior pituitary are embryologically derived from an outpouching of the roof of the pharynx, known as Rathke’s pouch.
There are five different types of cells, each of which secretes a different hormone or hormones.
The thyrotrophs synthesize and secrete thyrotropin (thyroid-stimulating hormone; TSH);
the gonadotrophs, both luteinizing hormone (LH) and follicle-stimulating hormone (FSH);
the corticotrophs, adrenocorticotropic hormone (ACTH; corticotropin);
the somatotrophs, growth hormone (GH; somatotropin); and
the lactotrophs, prolactin.
Hypopituitarism can affect various bodily functions, including growth, blood pressure regulation, and reproductive ability.
Growth Hormone (GH) Deficiency:
In children: Growth problems and short stature/dwarfism.
In adults: Loss of interest in activities, lack of social contacts.
Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH) Deficiency:Affects the reproductive system, leading to lowered sex drive, tiredness, and infertility.
Thyroid-Stimulating Hormone (TSH) Deficiency:
Causes hypothyroidism, resulting in sensitivity to cold and trouble staying warm.
Adrenocorticotropic Hormone (ACTH) Deficiency:Symptoms include frequent infections, nausea, vomiting, and abdominal pain.
Anti-diuretic Hormone (ADH) Deficiency (also known as vasopressin):
Impairs fluid balance in the body.
CENTRAL DIABETES INSIPIDUS
Definition: Hyperpituitarism involves excessive secretion of pituitary hormones.
Causes: It can result from pituitary tumors (adenomas) or other conditions.
Effects:
Growth Hormone (GH) Excess:
In children: Gigantism (excessive growth).
In adults: Acromegaly (enlargement of bones and tissues)...................
1&2-Male Reproductive system.ppt
The document discusses the male reproductive system. It covers sex determination in embryos, development of internal and external genitalia, and the anatomy and physiology of the male reproductive tract. This includes the testes, epididymis, vas deference, seminal vesicles, prostate, and penis. It also summarizes the hormonal regulation of reproduction by the hypothalamus, pituitary, and gonads. Key points are the roles of FSH, LH, testosterone, and other hormones in spermatogenesis and sexual function in males.
Comparative anatomy endocrine system
The document discusses the endocrine system in humans and other chordates. It describes the major endocrine glands and hormones, including the hypothalamus, pituitary gland, thyroid gland, parathyroid gland, adrenal glands, gonads, and others. It explains how the hypothalamus controls the pituitary gland to regulate hormone release, and the functions of key hormones like growth hormone, thyroid hormones, insulin, estrogen, and testosterone.
powerpoint-endocrine.pptx
The endocrine system is a messenger system comprising feedback loops of the hormones released by internal glands of an organism directly into the circulatory system, regulating distant target organs. In vertebrates, the hypothalamus is the neural control center for all endocrine systems.
The Hypothalamus and Pituitary Gland
This is the PDF version of our powerpoint presentation about the Hypothalamus, its function, what hormones it secretes and its main role in our body. This also has info about the Pituitary Gland, the hormones it releases and its function in our body.
Endocrine system ppt (l v bendre )hap
The endocrine system includes glands that secrete hormones directly into the bloodstream to regulate distant target tissues and organs. The major glands are the pituitary, thyroid, parathyroid, adrenal, pancreas, gonads, thymus, and pineal. The pituitary gland regulates other endocrine glands by secreting hormones like growth hormone, TSH, and ACTH. The thyroid regulates metabolism and produces thyroxine and triiodothyronine. Disorders include hypothyroidism and hyperthyroidism. The pancreas produces insulin to regulate blood sugar levels, and diabetes occurs when there is insufficient insulin. Sex glands like the ovaries and testes produce hormones like estrogen, progesterone and test
Endocrine system.pptx
The endocrine system regulates body functions through hormones released into the bloodstream. It includes glands like the pituitary, thyroid, pancreas and adrenals. The pituitary is called the "master gland" as it controls many other glands and processes via hormones. Hormones regulate crucial body processes including growth, metabolism, sexual development, and stress response. Imbalances can result in diseases such as diabetes or thyroid disorders.
Endocrine System
This document summarizes the major endocrine glands and hormones in the human body. It describes the hypothalamus, pituitary gland, thyroid gland, parathyroid gland, adrenal gland, pancreas, gonads and other minor endocrine tissues. For each endocrine organ, it lists the key hormones produced and their major functions in maintaining homeostasis, growth, metabolism, and reproduction. In total, it discusses 24 major hormones and their roles in coordinating and regulating various physiological processes.
Hormones (1)
Hormones are chemical messengers released by endocrine glands into the bloodstream to target organs. The main endocrine glands include the pituitary gland, pancreas, ovaries, testes, thyroid gland, and adrenal glands. Hormones have specific functions, such as regulating growth, metabolism, tissue function, sexual development, reproduction, sleep, and mood. They produce long-lasting, widespread effects on the target organs at very low concentrations in the bloodstream.
The Endocrine System
The endocrine system maintains homeostasis in the body through glands that secrete hormones directly into the bloodstream. The major glands include the pituitary, thyroid, parathyroid, adrenal glands, pancreas and gonads. The pituitary gland is called the "master gland" as it controls many other glands by producing hormones like ACTH, TSH, FSH, LH and growth hormone. These hormones target various organs and tissues to regulate processes like metabolism, growth and development, sexual function, mood, and other bodily functions.
Endocrine system
The endocrine system consists of glands that secrete hormones directly into the bloodstream. The major glands include the pituitary gland, thyroid gland, parathyroid gland, adrenal gland, pancreas, and thymus gland. The pituitary gland regulates most other endocrine glands and consists of the anterior and posterior lobes. The anterior lobe secretes growth hormone, prolactin, thyroid stimulating hormone, adrenocorticotropic hormone, follicle stimulating hormone, and luteinizing hormone. The posterior lobe secretes vasopressin and oxytocin.
Endocrine system by NP SELOMA
Gives the explanation of the endocrine system and has been well structured with easy access information
177-Anatomy-Endocrine-System.ppt
The endocrine system is made up of glands that produce hormones and release them into the bloodstream to regulate various bodily functions. The major glands include the hypothalamus, pituitary gland, thyroid gland, parathyroid glands, adrenal glands, pancreas, ovaries, and testes. Hormones control functions such as metabolism, growth, sexual development, reproduction, and the stress response. Imbalances in hormone levels can cause disorders that must be treated by controlling hormone production.
Endocrine system
The endocrine system is a messenger system comprising feedback loops of the hormones released by internal glands of an organism directly into the circulatory system, regulating distant target organs. In vertebrates, the hypothalamus is the neural control center for all endocrine systems.
Endocrine system
The document summarizes the key roles and functions of the endocrine system. It explains that the hypothalamus monitors body conditions and signals the pituitary gland if changes are needed. The pituitary gland is the "master gland" that then signals other endocrine glands to produce hormones in response. The hormones travel through the bloodstream and target specific cells and tissues to regulate processes like metabolism, growth, reproduction, and stress response. The document provides details on the hormones produced by the pituitary gland, thyroid gland, parathyroid glands, pancreas, ovaries, testes, adrenal glands, and pineal gland and their functions in controlling processes such as blood sugar levels, calcium regulation, sexual development, and the fight
nmnjkn,nlblujbkjhbmnbh Menstrual-Cycle.ppt
Puberty is the period when adolescents experience sexual maturity through the development of sex organs and production of gametes. Hormones like testosterone and estrogen regulate secondary sexual characteristics in males and females respectively. The female reproductive cycle, also called the estrous cycle, occurs over 28 days and involves the maturation of eggs in the ovaries, thickening of the uterus lining, ovulation on day 14, and shedding of the uterus lining as a period if fertilization does not occur. A series of hormones including FSH, estrogen, LH, and progesterone regulate different stages of the cycle.
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Hormones Revision
- 3. Reproductive • • • • • • • • • Pituitary Gland releases FSH Follicle-stimulating hormone (FSH) FSH stimulates women’s eggs Ovaries release oestrogen Oestrogen causes ovary lining to thicken Pituitary gland releases LH Luteinizing hormone LH stimulates egg release When eggs are unfertilised, periods occur
- 4. Reproductive Terms Name of hormone: Made in the… Activity: FSH Pituitary Gland Causes egg to mature Oestrogen Ovaries Causes line to thicken in first half of the cycle LH Pituitary Gland Stimulates ovulation (release of the egg from the ovary) Stimulate means…. Encourage activity What is the correct term for the release of the egg? Inhibit means… To stop process or production secretion
- 5. Gland hormone organ Gland Hormone Target organs Ovary Oestrogen Ovaries, uterus Ovary Progesterone Uterus Pancreas Insulin Liver Testes Testosterone Male reproductive organ
- 6. Pituitary Gland Produces 2 hormones involved in fertility: • FSH • LH
- 8. Plant • Auxin – a plant hormone produced in the stem tips and roots. • A 'tropism' is a growth in response to a stimulus. Plants grow towards sources of water and light, which they need to survive and grow.
- 9. Tropism • Plants need light and water for photosynthesis, to ensure they get both they rely on tropisms. • • • • positive tropism – towards the stimulus negative tropism – away from the stimulus phototropism – growth in response to light geotropism – growth in response to gravity
- 10. Homeostasis…
- 11. Human HOMEOSTASIS • Homeostasis is the keeping under control of: Temperature (37 degrees) Glucose Water Ion content • thermoregulatory centre is the part of the brain that controls body temperature. • The pancreas monitors and controls blood glucose. The pancreas contains insulin that lowers blood glucose levels.
- 12. Maintaining body temperature in HOMEOSTASIS. • Too hot: blood vessels dilate so blood vessels are closer to the skin and more energy can escape. VASODILATION • Too cold: blood vessels constrict so blood vessels are further away from the skin and consequently less energy is lost. VASOCONRTRICTION
- 13. Quiz …
- 14. • • • • • • • • • • • • Quiz Pituitary gland releases: LH and FSH Where is oestrogen found and what does it do? Found in ovary, thickens ovary lining Why does a period occur? Egg is unfertilised LH does…? FSH does…? LH - Stimulates ovulation, FSH- matures egg Correct term for releasing egg is: Secretion What is it to have the process stopped? Inhibit
- 15. • • • • • • • • • • • • • • • • • • • • What hormone do the following glands create? Ovary, ovary, pancreas, testes oestrogen, progesterone, Insulin, testosterone Plant hormone is: Auxin Explain TROPISM: The control of growth in plants. Directing them to grow to sunlight and water. positive tropism, negative tropism, phototropism, geotropism Growth towards stimulus, growth away from stimulus, growth towards sunlight, growth towards gravity Homeostasis keeps under control: Water, temperature, ion, glucose Where does the brain control temperature? Thermoregulatory What does the pancreas contain? Insulin What does the pancreas control? Glucose levels Vasodilation Blood vessels dilate (get wider) so that energy can escape through skin when hot Vasoconstriction Blood vessels constrict (get narrower) so less energy is lost when cold.