1. Announcements Download Powerpoint files AFTER lecture from password-protected website Students interested in Feeding Behavior Research on Thursday afternoon are encouraged to contact Dr. Davis Study questions will be updated to be consistent with 11 th edition of the text. Contact Dr. Davis regarding changes in lab days. Check email for first assignment due Friday.

2. Homeostasis: The relative constancy of the internal environment Steady state vs. equilibrium

3. The body: A society of interdependent cells, each type with its own needs and contributions.

4. O2O2

5. Cell Membrane: selectively permeable Capillaries: highly permeable except to proteins

6. Homeostasis Regulated via reflex arcs and naturally maintained by the process of negative feedback Measurement –Which physiological variables? –Averages and ranges

7. Fig. 01.08

8. Thermoregulation

9. Physics of thermal energy flow Cell metabolism= main source of heat

10. Conduction Convection Evaporation Radiation

11. Mechanisms of thermoregulation For constant body temp heat in = heat out Reflex arc Negative feedback Examples Acclimatization vs. adaptation