If your body is dehydrated, the control center in the brain will stimulate the release of a hormone which causes the reabsorption of water into the blood during urine formation. When the control center senses that enough water is reabsorbed, it will stop the release of the hormone. This is an example of
A) a negative feedback mechanism.
B) a positive feedback mechanism.
C) response to external stimuli.
D) lack of control over homeostasis.
E) a combination of negative and positive feedback. This is an example of a negative feedback mechanism because the change from normal is lessened and the loop shuts itself off.

Question

Quizplus · Accepted Answer

The scenario described follows the pattern of a negative feedback mechanism. The change in water levels triggers a response that reverses the change until the optimal level is reached, at which point the response stops.

If Your Body Is Dehydrated, the Control Center in the Brain