Vessels and Circulation Chapter 22 Introduction
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Questions and Answers

What is the primary function of capillaries?

  • To produce red blood cells
  • To exchange nutrients and waste with surrounding tissue (correct)
  • To regulate blood pressure
  • To transport oxygen to tissues

What type of capillaries have gaps in their endothelium?

  • Fenestrated capillaries
  • Sinusoids (correct)
  • Discontinuous capillaries
  • Continuous capillaries

What is the term for a collection of capillaries?

  • Capillary network
  • Capillary bed (correct)
  • Capillary system
  • Capillary

Which type of vein collects blood from capillaries?

<p>Venules (B)</p> Signup and view all the answers

What is the mechanism responsible for exchange of materials through pores in capillary walls?

<p>Diffusion across pores (A)</p> Signup and view all the answers

What is the outermost layer of an arteriole?

<p>Adventitia (C)</p> Signup and view all the answers

What is the primary function of the pulmonary circuit?

<p>Supply the lungs (C)</p> Signup and view all the answers

Where does the systemic circuit begin and end?

<p>Begins at the Aortic Valve and ends at the Rt Atrium (D)</p> Signup and view all the answers

What is the function of the intima in arteries?

<p>It allows for expansion and relaxation in response to the pressure wave of blood flow (A)</p> Signup and view all the answers

What type of artery is characterized by its lack of vasoconstriction in response to sympathetic or local stimulation?

<p>Elastic Arteries (B)</p> Signup and view all the answers

What occurs as vessels enter organs?

<p>They branch out to form smaller vessels (D)</p> Signup and view all the answers

What is the function of the media layer in blood vessels?

<p>It causes vasoconstriction and vasodilation (A)</p> Signup and view all the answers

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