• Share
  • Email
  • Embed
  • Like
  • Save
  • Private Content
Notes: Endocrine System
 

Notes: Endocrine System

on

  • 3,650 views

 

Statistics

Views

Total Views
3,650
Views on SlideShare
3,594
Embed Views
56

Actions

Likes
0
Downloads
98
Comments
0

3 Embeds 56

http://mrschrinersanatomy.blogspot.com 54
http://www.mrschrinersanatomy.blogspot.com 1
http://www.slideshare.net 1

Accessibility

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

    Notes: Endocrine System Notes: Endocrine System Presentation Transcript

    • Endocrine System
    • Endocrine System
      • Glands that secrete chemical messengers (HORMONES)
      • Hormones act on specific organs or entire body
      • Pituitary, Thyroid, Parathyroid, Adrenal, Pineal, Thymus, Pancreas, Gonads (Ovaries & Testes), Hypothalamus
    • Pituitary - hangs from the Hypothalamus of the Diencephalon. 2 lobes:
      • Anterior lobe
        •   a. Growth hormone (GH) - regulates mitosis & growth of body cells
        • b. Thyroid stimulating hormone (TSH) - controls thyroid activity
        • c. Adrenocorticotropic hormone (ACTH) - controls activity of adrenal cortex
        • d. Follicle stimulating hormone (FSH) - stimulates oogenesis (egg) & spermatogenesis (sperm)
        • e. Luteinizing hormone (LH) - Stimulates release of male & female sex hormones
        • f. Prolactin (PRL) - milk production  
    • Pituitary – Post. Lobe
      •   Posterior Lobe: 2 hormones produced in the hypothalamus are stored here; 
        • a. Oxytocin - causes uterine contractions during labor and milk release during suckling.  
        • b. Antidiuretic hormone (ADH, Vasopressin) - inhibits urine formation.  
    • Thyroid - just below larynx, releases 2 hormones
      •          1. Thyroid Hormone (TH) - it increases cellular activity in skeletal, reproductive & nervous systems
      •          2. Calcitonin - decreases blood calcium levels by stimulating the deposition of Calcium into bone.
    • Parathyroids - 4 masses on back of thyroid.
      • They release parathyroid hormone (PTH)  in response to low calcium levels – increases blood calcium levels by stimulating the removal of Calcium from the bone.  
    • Pancreas - Hormones are secreted from islets
      • 1. Beta Cells: secretes Insulin in response to high levels of glucose - it decreases blood sugar  
      • 2. Alpha Cells: secretes Glucagon in response to low levels of glucose - it increases blood sugar
    • Adrenal gland – on top kidneys, 2 areas:
      • 1. Cortex - secretes steroids = Corticosteroids (in response to ACTH); 3 types
        • a. Mineralocorticoids - regulate sodium & potassium levels  
        •   b. Glucocorticoids - increases breakdown of fats & proteins       to generate blood glucose = anti-stres
        • c. Gonadocorticoids - sex hormones (Estrogen, Progesterone, and Testosterone may affect the onset of puberty, pubic and axillary hair development, and sex drive.  
      • 2. Medulla - secretes Epinephrine (adrenaline) & Norepinephrine (noradrenalin), "fight or flight"
    • Gonads
      • 1. Testes - testosterone  
      • 2. Ovaries - estrogen & progesterone
    • Thymus: upper thorax, posterior to sternum
      • Secretes Thymosin which causes the T-cells of the immune system to mature.