Absorption mechanisms · Physiology

Which mechanism is responsible for calcium absorption in the intestine?

  1. Simple diffusion across the membrane
  2. Vitamin D-dependent active transport
  3. Facilitated diffusion via GLUT carriers
  4. Non-selective endocytosis of calcium
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Correct answer: Vitamin D-dependent active transport

Calcium absorption is regulated by vitamin D. It involves active transport especially in the duodenum.

Difficulty: Medium Question 13 of 40

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