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

question 53

Multiple Choice

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.

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