1. HOMEOSTASIS

2. What is homeostasis?  Self-regulating process by which biological systems tend to maintain stability while adjusting to conditions that are optimal for survival.  WHAT?!?!?!?  In a group of 2-3 people put the above statement into your own words.

3. How does it work?  Use feedback mechanism to keep system at equilibrium.  2 types  Negative feedback- system changes and goes back to the set point.  Positive feedback- system changes and continues in that direction.

4. How does it work  In humans use glands to determine levels of blood and when there is a change the body reacts.  Ex- hypothalamus  Body temperature  When temperature is too low:  Blood vessels constrict pushing blood to center of body, muscles contract to give off heat.  When temperature is too high:  Blood vessels dilate pushing blood to skin, sweat is secreted to cool skin.

5. Homeostasis video  Homeostasis video Homeostasis video

6. Other examples of homeostasis  Movement of ions across membranes  pH  Blood sugar  IN A GROUP OF 2-3 PEOPLE COME UP WITH AN EXAMPLE OF SOMETHING YOU LEARNED THIS YEAR AND HOW IT RELATES TO HOMEOSTASIS.