Homeostasis and Feedback

Question 1

Homeostasis

Answer 1

-maintenance of relatively stable internal conditions despite the continuous changes in environment

-a dynamic state of equilibrium
–conditions vary, but within limits

Question 2

Negative feedback

Answer 2

-most common feedback mechanism
-response reduces original stimulus
-ex: regulating body temperature

Question 3

Positive feedback

Answer 3

-not as common feedback mechanism (platelets and child brith)
-response enhances original stimulus
–amplifying effect

-usual controls infrequent event that do not require continuous adjustment
-ex: enhancement of labor contractions by oxytocin