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Chapter 21: Arteries, Capillaries, and Veins
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Chapter 21: Arteries, Capillaries, and Veins

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Questions and Answers

What is the primary function of venules in the circulatory system?

  • Regulate blood flow and pressure
  • Conduct blood from heart to muscular arteries
  • Deliver blood to capillaries
  • Drain blood from capillaries into veins (correct)
  • What type of artery is characterized by a larger diameter and more elastic fibers?

  • Elastic artery (correct)
  • Arteriole
  • Muscular artery
  • Venule
  • What is the term for the tightening of blood vessels, which increases blood pressure?

  • Vascular resistance
  • Vasodilation
  • Blood flow
  • Vasoconstriction (correct)
  • What type of capillary is characterized by incomplete pores and a basement membrane, allowing for the transport of molecules and plasma proteins?

    <p>Sinusoid Capillary</p> Signup and view all the answers

    What is the equation for cardiac output (CO)?

    <p>CO = heart rate (HR) × stroke volume (SV)</p> Signup and view all the answers

    What is the consequence of left ventricular failure on the organs?

    <p>Reduced oxygen to organs</p> Signup and view all the answers

    What is the primary function of arteries in the body?

    <p>To carry blood away from the heart to the tissues</p> Signup and view all the answers

    What is the characteristic of capillary walls that allows for exchange of nutrients and waste?

    <p>They are thin and permeable</p> Signup and view all the answers

    Which layer of blood vessels contains smooth muscle and elastic fibers?

    <p>Tunica Media</p> Signup and view all the answers

    What is the purpose of valves in veins?

    <p>To allow proper blood flow</p> Signup and view all the answers

    Why are the layers of blood vessels thicker in arteries?

    <p>To withstand pressure</p> Signup and view all the answers

    What is the lumen of a blood vessel?

    <p>The cavity space</p> Signup and view all the answers

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