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Insulin lowers blood glucose partly by causing cells to

  • A.insert glucose transporters into the membrane
  • B.break down their own plasma membranes entirely
  • C.stop respiring glucose altogether from then on
  • D.convert the glucose directly into muscle protein

Answer: A

Vesicles carrying the transporter fuse with the surface, so glucose enters more rapidly. Withdrawing the signal causes the transporters to be retrieved again. The response is therefore quick to establish and quick to reverse.

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