A behavioural physiologist is studying the homeostatic control of blood pH. In a trial, a lizard runs on a treadmill for a set amount of time and the blood pH is measured. The blood pH drops as carbon dioxide is released into the bloodstream. Which component of the homeostatic feedback system is responsible for determining whether the blood pH is far enough from normal that a response is necessary?
A) effector
B) integrator
C) assimilator
D) sensor

Question

Quizplus · Accepted Answer

The integrator in a homeostatic feedback system is responsible for determining whether the variable (in this case, blood pH) has deviated from its set point enough to warrant a response. It receives information from sensors that monitor changes in conditions and then determines the appropriate response to bring the condition back to its normal state.

A Behavioural Physiologist Is Studying the Homeostatic Control of Blood