Multiple choice

The most critical physiological factor controlling hunger is the

  1. level of blood sugar

  2. presence of stomach contractions

  3. taste of food

  4. presence of weakness or fatigue
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A Correct answer
Explanation

Blood sugar (glucose) level is the most critical hunger signal according to the glucostatic theory - when glucose drops, hunger increases. Stomach contractions (hunger pangs) are a symptom, not the control mechanism. Taste and weakness/fatigue can influence eating but are secondary to glucose levels. The brain monitors glucose via receptors and triggers hunger when levels fall.

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