Smooth and Cardiac Muscle Physiology · Physiology

Gap junctions in smooth muscle primarily function to:

  1. Increase cellular ATP synthesis rate
  2. Electrically couple adjacent cells
  3. Store and buffer calcium ions
  4. Anchor and align actin filaments
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Correct answer: Electrically couple adjacent cells

Gap junctions permit ion flow between adjacent smooth muscle cells. This allows coordinated contraction of the muscle layer.

Difficulty: Medium Question 18 of 20

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