1. Copyright Pearson Prentice Hall
I will understand how feedback loops in the endocrine system regulate homeostasis in the body. MT: Organ Systems
Slide
of 44
End Show
Copyright Pearson Prentice Hall

2. Control of the Endocrine System
Q: How does the endocrine system maintain homeostasis?
A: Feedback loops that increase or stop a process from occurring.
Slide
of 44
End Show
Copyright Pearson Prentice Hall

3. Copyright Pearson Prentice Hall
39-1 The Endocrine System
Feedback Loops
1.Negative Feedback
2. Positive Feedback
stops a cycle
increases a cycle - +-
Slide
of 44
End Show
Copyright Pearson Prentice Hall

4. Parts of Endocrine System Regulated by Feedback Loops

5. Example of Negative Feedback in Body
high blood sugar levels
glucagon releases sugar into blood
pancreas cells alerted
pancreases releases glucagon
pancreas secretes insulin into blood
brain tells pancreas to stop releasing insulin
insulin allows cells to absorb sugar
blood sugar level drops

7. + + Example of Positive Feedback in Body
1. Damaged blood vessel
2. Collagen in vessels trap platelets in blood
3. Platelets release clotting factors in blood +
4. Clotting factors cause more platelets to get trapped in collagen +
5. Platelets release more clotting factors
6. Get a blood clot