1. Aim: How does the Endocrine System work in our body?

2. The Endocrine System FUNCTIONS:
Maintains stable body function (homeostasis)
Responds to changes
Collection of glands that produce hormones
Control processes that happen slowly (nervous system controls those that happen quickly)

3. What are glands? Tissues found throughout your body
Produce chemical messages
HORMONES
- speed up or slow down cellular activities
Glands release their hormone directly into the blood  transports to target tissue
FUNCTIONS:
Regulate internal environment
Adapt to stressful situations
Growth & development

4. Types of Glands: Pituitary Thyroid Located in the brain
Growth and reproduction
‘master’ gland
Hypothalamus
controls the pituitary gland
Specialized cells located in brain that link the endocrine system with the nervous system
Thyroid
Located below the larynx
Regulates metabolism and bone growth

6. Important Hormones Androgens Insulin/ Glucagon
Testosterone – male reproductive hormone
Estrogen – female reproductive hormone
Insulin/ Glucagon
Work together to maintain stable levels of blood sugar
Insulin- released when levels of blood sugar are high
Glucagon- causes the liver to release stored glucose from cells into the body when glucose is low

8. What does the endocrine system do????
Hormone secreted  travels to ‘target’ cell
Each have a specific receptor

9. Negative Feedback System
Controls the amount of hormones in your body- adjusts hormone levels automatically
Example:
STIMULUS- eating a sandwich
1. Intestine takes in glucose
Glucose in bloodstream increases
Glucose detected by insulin from pancreas
Pancreas responds by producing more insulin
Insulin released  liver takes up glucose
Glucose level decreases (body consumes glucose)
Homeostasis restored