1. Describe one way your body maintains homeostasis. Put page 1 of your homework packet out on your desk!

2. Agenda Feedback Mechanisms Notes (10 min) Feedback Loops Video (15 min) Homeostasis Review Practice (15 min) Homeostasis Children’s Book (50 min)

3. How does your body actually maintain homeostasis Review: What is homeostasis?

4. Feedback Mechanisms Negative Feedback Mechanisms – The stimulus creates a response and then that response is stopped Positive Feedback Mechanisms – The stimulus creates a response and then that response keeps going

5. Negative Feedback Mechanisms Example

6. Negative Feedback Mechanism Example When you eat your blood sugar (glucose) levels increase This causes your pancreas to release insulin to absorb the extra blood glucose After blood sugar drops back to normal, insulin is not made anymore

7. Checkpoint Define ‘Negative Feedback Mechanism’ in your own words

8. Regulating Blood Sugar

9. Positive Feedback Mechanisms Example During childbirth, a hormone called oxytocin is released Oxytocin causes the uterus to contract As oxytocin levels increase, your brain signals to release even more oxytocin so your uterus contracts even more…

10. Oxytocin

11. Video https://youtu.be/CLv3SkF_Eag

12. Exit Ticket Why would negative feedback mechanisms be more common in our bodies than positive feedback mechanisms?