announcements download powerpoint files after lecture from password-protected website students...
TRANSCRIPT
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 11th edition of the text.
• Contact Dr. Davis regarding changes in lab days.
• Check email for first assignment due Friday.
Homeostasis:
• The relative constancy of the internal environment
• Steady state vs. equilibrium
The body: A society of interdependent cells, each type with its own needs and contributions.
O2
Cell Membrane: selectively permeable
Capillaries: highly permeable except to proteins
Homeostasis
• Regulated via reflex arcs and naturally maintained by the process of negative feedback
• Measurement– Which physiological variables?– Averages and ranges
Fig. 01.08
Thermoregulation
Physics of thermal energy flow
Cell metabolism=main source of heat
• Conduction
• Convection
• Evaporation
• Radiation
Mechanisms of thermoregulation
For constant body temp heat in = heat out
• Reflex arc
• Negative feedback
• Examples
• Acclimatization vs. adaptation