At concentrations present in the diet, which vitamin is absorbed primarily by diffusion?
Correct Answer: Vitamin D
Description: Absorption of vitamin D increases linearly as the intraluminal concentration increases, suggesting absorption by a non saturable passive-diffusion mechanism. The term vitamin D refers to a family of essentially water-insoluble compounds involved primarily in the regulation of calcium homeostasis.At the low concentrations present in the diet (1 to 100 nM), transport of the vitamins across the brush border occurs by specialized mechanisms, such as membrane carriers, active transport systems, and membrane-binding proteins and receptors, specific for a particular vitamin.
Category:
Unknown
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now