Human Physiology: From Cells to Systems (MindTap Course List)
Human Physiology: From Cells to Systems (MindTap Course List)
9th Edition
ISBN: 9781285866932
Author: Lauralee Sherwood
Publisher: Cengage Learning
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Chapter 1, Problem 3TAHL

The hormone insulin enhances the transport of glucose (sugar) from the blood into most body cells. Its secretion is controlled by a negative-feedback system between the concentration of glucose in the blood and the insulin-secreting cells. Therefore, which of the following statements is correct?

  1. A decrease in blood glucose concentration stimulates insulin secretion, which in turn further towers blood glucose concentration.
  2. An increase in blood glucose concentration stimulates insulin secretion, which in turn lowers blood glucose concentration.
  3. A decrease in blood glucose concentration stimulates insulin secretion, which in turn increases blood glucose concentration.
  4. An increase in blood glucose concentration stimulates insulin secretion, which in turn further increases blood glucose concentration.
  5. None of the preceding is correct.

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