medium · MCAT bio-biochem
A 45-year-old patient presents with symptoms of dehydration. The physician explains that the kidneys will respond by increasing water reabsorption in the collecting ducts through the action of antidiuretic hormone (ADH).
This physiological response, which acts to return blood osmolarity toward a set point, is an example of which type of feedback mechanism?
- Positive feedback
- Open-loop control
- Negative feedback
- Feed-forward regulation
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