Endocrine System Powerpoint Blevins

2. What is the endocrine system?What is the endocrine system?
The endocrine system is a complex collection of
glands that control basic body functions such
as metabolism, mood, growth and sexual
development.
Some hormones also
allow you to respond
to stress

3. How does the Endocrine System RegulateHow does the Endocrine System Regulate
the Body?the Body?
It is made of glands that
secrete hormones
directly into your
bloodstream
These hormones cause
changes in your body

4. What is a hormone andWhat is a hormone and
what do they do?what do they do?
• A hormone is a “chemical messenger”
– A chemical that delivers a message
• Hormones are made in the glands of your
endocrine system and secreted into your blood
• They travel
through your
blood until they
reach special
target cells

5. Endocrine GlandsEndocrine Glands
• Hypothalamus – part of the CNS, but it
produces hormones that influence the
pituitary gland
• Pituitary Gland – the “master gland”
- Located at the base of the brain
- Secretes growth hormone which affects growth of
bone and cartilage

6. Endocrine Glands (continued)Endocrine Glands (continued)
• Thyroid Gland
- Located in the neck
- Secretes thyroxine which regulates the rate of
metabolism in the body
• Parathyroid Gland
- Embedded in the back of the thyroid
- Secretes parathormone which controls
metabolism of calcium and phosphate

7. Endocrine Glands (continued)Endocrine Glands (continued)
• Gonads – sex glands
- Male gonads are called testes
- Located in the scrotum
- Secrete testosterone which regulates
male secondary sex characteristics
- Female gonads are called ovaries
- Located in the pelvic region
- Secrete estrogen and progesterone
which regulate female secondary sex
characteristics

8. Examples of HormonesExamples of Hormones
Hormone Gland Function
Melatonin Pineal Causes sleepiness:
“circadian rhythm”
Adrenalin Adrenal Fight or flight response
Growth hormone Pituitary Stimulates growth and cell
reproduction
Insulin Pancreas Regulates energy and
glucose (sugar) in the blood
Testosterone Testes Production and regulation
of male reproductive
system
Estrogen Ovaries Production and regulation
of female reproduction
system

9. How does the Endocrine SystemHow does the Endocrine System
Compare to the Nervous System?Compare to the Nervous System?
• Like the nervous system, the endocrine system
is a controlling system of the body
• The brain controls the endocrine system,
but they work together
to regulate the body
• In the brain is the
hypothalamus, also
known as the "master
switchboard."

10. How does the Endocrine SystemHow does the Endocrine System
Compare to the Nervous System?Compare to the Nervous System?
1. Hormones are transported around (to their target
organs) the body by the blood. They’re slow compared
with nervous responses.
2. Many hormonal responses (ex: growth) occur over
relatively long periods of time.
3. The main purpose of the Endocrine System is to maintain
Homeostasis within the body (that is, to keep the
internal environment constant/within balance)
4. The key function of the Nervous System is to receive and
respond to stimuli.

11. Why do people pee their pants
when they are scared?
There’s actually a
scientific explanation!
The Fight or Flight
Response.

12. Fight or Flight Response
Controlled by an area of
the brain called the
hypothalamus: the part
of the brain that links
the nervous and
endocrine systems.

13. Fight or Flight Response
When we think we are in
danger, the hypothalamus
begins a series of nerve
cell firings and releases
hormones like adrenaline,
into our bloodstream.
These patterns of nerve cell
firing and chemical
release cause our body to
undergo a series of very
dramatic changes.

14. • Create a cartoon demonstrating an
organism experiencing the fight or flight
response
• Your cartoon must show:
1. The external stimulus (what caused the
stress)
2. How the organism responds
1. What happens inside their body?
2. What do they do?

15. Example CartoonExample Cartoon
Stimulus : ResponseStimulus : Response
Bear =
external stimulus
Response =
Hypothalamus releases
hormones into body
Response =
Heart rate and
breathing rate
increase, sweating
increases, blood
thickens, blood flow
to muscles increase
all so we can RUN!
Hormones become =
Internal stimulus

16. Patient Name _______________Patient Name _______________
• Symptoms:
• Patient Diagnosis:
• Why?

17. Patient Name _______________Patient Name _______________
• Symptoms:
• Patient Diagnosis:
• Why?

18. Patient Name _______________Patient Name _______________
• Symptoms:
• Patient Diagnosis:
• Why?

19. Patient Name _______________Patient Name _______________
• Symptoms:
• Patient Diagnosis:
• Why?