Venous System: Venules and Veins
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Questions and Answers

What is the common pulse site known as the 'antecubital region'?

  • Popliteal artery
  • Radial artery
  • Brachial artery (correct)
  • Carotid artery

    • How does an increase in cardiac output affect blood pressure and flow?

  • Increases blood pressure and decreases flow
  • Increases blood pressure and flow (correct)
  • Decreases blood pressure and flow
  • Decreases blood pressure and increases flow

    • What effect does a narrower and longer vessel have on blood flow and pressure?

  • Increases resistance, decreases flow, increases pressure (correct)
  • Increases resistance, flow, and pressure
  • Decreases resistance, increases flow, decreases pressure
  • Decreases resistance, flow, and pressure

    • How does the thickness of blood (viscosity) affect blood pressure?

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

    What happens to blood pressure when there is less blood in the body (hypovolemia)?

    <p>Blood pressure decreases (D)</p> Signup and view all the answers

    What is the main function of arterioles in the circulatory system?

    <p>To slow down blood flow and decrease blood pressure (D)</p> Signup and view all the answers

    Which type of capillary has pores that make it permeable to larger molecules?

    <p>Fenestrated capillary (A)</p> Signup and view all the answers

    What is the diameter range of a muscular artery?

    <p>1mm to 10mm (A)</p> Signup and view all the answers

    What is the function of a precapillary sphincter?

    <p>To allow blood into a capillary bed or not (D)</p> Signup and view all the answers

    In what type of capillary is the vessel wall only one cell thick?

    <p>Sinusoid capillary (A)</p> Signup and view all the answers

    Why is it important for arterioles to always have slightly contracted muscle fibers?

    <p>To slow down blood flow and decrease blood pressure (D)</p> Signup and view all the answers

    What are the primary sites for diapedesis?

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

    Where does blood in the bone marrow, liver, and integument reside?

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

    Which blood vessels are considered blood reservoirs?

    <p>Veins (A)</p> Signup and view all the answers

    What prevents backflow in veins?

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

    What is the function of vasa vasorum in blood vessels?

    <p>Deliver nutrients and remove waste from cells of large vessels (B)</p> Signup and view all the answers

    What is the average force driving blood into the vessels known as?

    <p>Mean arterial pressure (B)</p> Signup and view all the answers

    Which layer of a blood vessel is innervated by nervi vasorum and controlled by hormones and local chemicals?

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

    What is the calculation for pulse pressure?

    <p>(Systolic - Diastolic) BP (C)</p> Signup and view all the answers

    What is the main function of vasoconstriction in blood vessels?

    <p>Decreases blood flow and increases blood pressure (D)</p> Signup and view all the answers

    What is the role of the external elastic membrane in large arteries?

    <p>Separates the media from the outer tunic (B)</p> Signup and view all the answers

    Why do veins have valves?

    <p>Make sure blood does not flow backward (B)</p> Signup and view all the answers

    What is the main role of the tunica externa in veins?

    <p>Holds the vessel in position by binding with surrounding structures (D)</p> Signup and view all the answers

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