Which one of the following findings would support the glucostatic hypothesis?
Correct answer: B. Injections of insulin provoke food intake
- A. Rats have the same level of plasma glucose concentration just before meals as just after
- B. Injections of insulin provoke food intake
- C. Infusions or injections of glucose and insulin provoke feeding
- D. Infusions of a competitive inhibitor of glucose in to the medulla reduce feeding
Explanation
The glucostatic hypothesis predicts that a fall in usable glucose triggers eating; insulin lowers blood glucose and can therefore provoke food intake. Glucose itself generally reduces feeding rather than inducing it.
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