Capillary Classification and Structure
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Questions and Answers

Where are sinusoidal capillaries mainly found?

  • Bone marrow (correct)
  • Endocrine glands
  • Intestinal villi
  • Skin of palm
  • What is a unique characteristic of fenestrated capillaries?

  • Endothelial cells have large openings without diaphragms (correct)
  • They have a relatively large caliber
  • They rest on a discontinuous basal lamina
  • Macrophages are associated within or around them
  • What is the primary function of continuous capillaries?

  • Maximal exchange between tissues and blood
  • Thermoregulation at the body surface
  • Allows more molecular exchange between tissues and blood (correct)
  • Movement of cells
  • Which type of capillaries serve in thermoregulation at the body surface?

    <p>AV shunts</p> Signup and view all the answers

    Where do fenestrated capillaries play a significant role in molecular exchange?

    <p>Liver</p> Signup and view all the answers

    Which type of capillary has a characteristic of direct routes between arterioles and venules without passing in the capillary bed?

    <p>AV shunts</p> Signup and view all the answers

    Which type of capillaries has endothelial cells joined together by occluding junctions?

    <p>Continuous capillaries</p> Signup and view all the answers

    In which type of capillaries are the fenestrations closed by a thin non-membranous diaphragm?

    <p>Fenestrated capillaries</p> Signup and view all the answers

    Which type of capillaries has the wall without fenestrations and contains numerous pinocytotic vesicles for molecule transport?

    <p>Continuous capillaries</p> Signup and view all the answers

    Where are fenestrated capillaries commonly found?

    <p>Lung and skin</p> Signup and view all the answers

    Which type of capillaries is known to share in the formation of blood barriers like the blood-brain barrier?

    <p>Continuous capillaries</p> Signup and view all the answers

    In which type of capillaries may pericytes undergo differentiation to become smooth muscle cells and endothelial cells?

    <p>Sinusoidal capillaries</p> Signup and view all the answers

    What is the histological structure of capillaries?

    <p>Single layer of squamous endothelial cells with a lumen diameter of 8 to 10 mm</p> Signup and view all the answers

    Which type of capillary has the identifying characteristic of a large number of pinocytotic vesicles associated with the entire plasmalemma?

    <p>Continuous capillaries</p> Signup and view all the answers

    What is the function of pericytes in capillaries and post-capillary venules?

    <p>Supporting the structures with branching cytoplasmic processes</p> Signup and view all the answers

    Which type of capillary does not have continuous endothelium but contains fenestrations or pores?

    <p>Fenestrated capillaries</p> Signup and view all the answers

    In peripheral circulation, what do arteriovenous shunts connect?

    <p>Arteries and veins</p> Signup and view all the answers

    What is the main site for trans-migration of white blood cells during inflammation?

    <p>Capillaries</p> Signup and view all the answers

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