The Cardiovascular System: Blood Vessels and Circulation Chapter 20 Quiz
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Questions and Answers

What is the function of vasa vasorum?

  • Constrict smooth muscle in the tunica intima
  • Deliver nutrients and remove waste from the cells of large vessels (correct)
  • Separate the media from the outer tunic in large arteries
  • Allow blood into a capillary bed or not

    • Which blood vessels have valves to ensure blood does not flow backward?

  • Venules
  • Arterioles
  • Arteries
  • Veins (correct)

    • What causes vasoconstriction?

  • Is a result of the expansion of the artery due to the ejection of blood
  • Increases blood flow and decreases blood pressure
  • Allows blood into a capillary bed or not
  • Decreases blood flow and increases blood pressure (correct)

    • What is the main function of arterioles?

    <p>Lead to capillaries and slow down blood flow</p> Signup and view all the answers

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

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

    What does a high pulse pressure (100 mm Hg) signify?

    <p>A significant difference between systolic and diastolic pressure</p> Signup and view all the answers

    What happens if mean arterial pressure falls below 60 mm Hg for an extended period?

    <p>Hypoxia and ischemia become concerns</p> Signup and view all the answers

    Which factor directly increases both blood pressure and blood flow?

    <p>Increase in arterial compliance</p> Signup and view all the answers

    What effect does a narrowing and lengthening of a vessel have on resistance, flow, and pressure?

    <p>Increases resistance, decreases flow, increases pressure</p> Signup and view all the answers

    What would be the result of hypovolemia on blood pressure?

    <p>Decrease in blood pressure</p> Signup and view all the answers

    Which system picks up extra fluid and eventually dumps it into the subclavian vein in the neck?

    <p>Lymphatic system</p> Signup and view all the answers

    What is responsible for stimulating cardiac function through sympathetic action?

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

    What is the function of Venoconstriction?

    <p>Decreases resistance in veins</p> Signup and view all the answers

    Which hormone targets the kidneys to reabsorb water, increasing blood volume and pressure?

    <p>Antidiuretic Hormone (ADH)</p> Signup and view all the answers

    What is the main function of the Respiratory pump in the venous system?

    <p>Help force blood back toward the heart</p> Signup and view all the answers

    What does the Renin-Angiotensin-Aldosterone Mechanism produce that is a powerful vasoconstrictor?

    <p>Angiotensin 2</p> Signup and view all the answers

    What happens during filtration in the Capillary Exchange Program?

    <p>Fluid moves from high pressure capillary to low pressure tissues</p> Signup and view all the answers

    Which system regulates blood pressure and flow through stretch receptors in vessels and chambers?

    <p>Cardiovascular system</p> Signup and view all the answers

    What is the role of Osmotic pressure in the Capillary Exchange Program?

    <p>Moves fluid back into capillaries due to osmotic pressure</p> Signup and view all the answers

    What effect does Vasoconstriction have on arteries?

    <p>Increases pressure and resistance</p> Signup and view all the answers

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