Capillaries 101

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Questions and Answers

What are the three types of capillaries that exist in the body?

  • Continuous, fenestrated, and sinusoidal (correct)
  • Continuous, muscular, and sinusoidal
  • Muscular, fenestrated, and sinusoidal
  • Continuous, fenestrated, and muscular

What is the composition of a capillary?

  • Endothelium, pericytes, and collagen fibers
  • Endothelium, smooth muscle, and pericytes
  • Endothelium, basal lamina, and smooth muscle
  • Endothelium, basal lamina, and pericytes (correct)

What are pericytes?

  • Specialized cells that form the basal lamina of the capillary
  • Pale-stained, relatively undifferentiated cells that are associated with the abluminal aspect of the endothelium (correct)
  • Cells that produce collagen and reticular fibers in the capillary
  • Cells that control the permeability of the capillary

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