1. Aim: How does the Endocrine System Function to Maintain Homeostasis?
DO NOW
In your notebook, write down any facts about the endocrine system that you know.

2. Endocrine System Made up of Glands Glands secrete Hormones
Regulatory System
Function: to secrete hormones that regulate bodily functions
Mechanism: Negative Feedback
(ex. home thermostat)

3. Hormones Chemical messages Travel in the blood Longer-lasting message
Each hormone has a target organ
Hormone must match receptor present on target organ for message to be delivered (shapes will fit)
Enables Communication

4. Endocrine Glands Gland(s) Hormone(s) Function How many? Pancreas
Insulin & Glucagon
lower & raise blood sugar level
one
Testes
(male)
Testosterone
Promotes male secondary sex characteristics & stimulates sperm production
two
Ovaries
(female)
Estrogen
Promotes female secondary sex characteristics & stimulates egg production
Adrenal Glands
Adrenaline
Prepares you for “fight or flight” response
Two (one above each kidney)

5. Endocrine Glands Gland(s) Hormone(s) Function How many? Pituitary
(Master Gland)
Human Growth (HGH)
Anti-Diuretic (ADH)
regulates growth
regulates amount of water in body
one (in brain)
Thyroid
thyroxine
regulates body metabolism
one
Parathyroids
parathormone
raises calcium level in blood
two

6. Visual

7. Negative Feedback Visual

8. Questions 1. What is the target organ for insulin?
2. What is the target organ for testosterone?
3. What is the target organ for estrogen?
4. What is the target organ for ADH?

9. Video

10. Group-Work
Practice questions on hormones handout

11. Individual Work
Answer AIM

12. Homework
regents question handout (multiple-choice)