Cardiovascular System: Blood Vessels Chapter 20.1 Quiz
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Questions and Answers

What is the function of vasa vasorum in blood vessels?

  • Prevent backflow of blood in veins
  • Increase blood flow in capillaries
  • Deliver nutrients and remove waste from large vessels (correct)
  • Regulate blood pressure in arteries

    • Which layer of the blood vessel is responsible for vasoconstriction?

  • Tunica externa
  • Tunica intima (correct)
  • Internal elastic membrane
  • Tunica media

    • Why are arterioles important for controlling blood pressure?

  • They have a thick layer of smooth muscle
  • They lead to capillaries where exchange occurs
  • They decrease blood flow to reduce pressure (correct)
  • Their muscle fibers are always relaxed

    • Which type of capillary has an incomplete basement membrane allowing plasma proteins and cells to pass through?

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

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

    <p>Feed capillaries with blood</p> Signup and view all the answers

    How does resistance affect blood flow in vessels?

    <p>Slows down blood flow</p> Signup and view all the answers

    What does the term 'pulse pressure' represent in the context of blood pressure measurement?

    <p>'Difference between systolic and diastolic pressure'</p> Signup and view all the answers

    'Viscosity' of blood refers to which characteristic?

    <p>'Thickness of blood'</p> Signup and view all the answers

    In the formula for Mean Arterial Pressure (MAP), what does the 'diastolic BP' stand for?

    <p>Pressure during ventricular relaxation</p> Signup and view all the answers

    What is the main function of a precapillary sphincter?

    <p>Control whether blood enters capillary beds or not</p> Signup and view all the answers

    What is the primary purpose of the skeletal muscle pump mentioned in the text?

    <p>To increase blood flow towards the heart</p> Signup and view all the answers

    What role does venoconstriction play in blood circulation?

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

    Which of the following best describes the process of reabsorption in the context of capillary exchange?

    <p>Movement of fluid back into capillary due to hydrostatic pressure</p> Signup and view all the answers

    How does the lymphatic system contribute to maintaining vascular homeostasis?

    <p>By returning excess fluid to the circulatory system</p> Signup and view all the answers

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

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

    What is the primary purpose of the Renin-Angiotensin-Aldosterone Mechanism in the body?

    <p>To regulate vasoconstriction and water reabsorption</p> Signup and view all the answers

    What is the function of Baroreceptors in the context of vascular regulation?

    <p>To stretch receptors send info to cardiovascular center</p> Signup and view all the answers

    What is the impact of exercise on LDL cholesterol according to the text?

    <p>Decreases LDL cholesterol levels</p> Signup and view all the answers

    What is a key characteristic of Hypovolemic Shock?

    <p>Involves hemorrhage or excessive fluid loss</p> Signup and view all the answers

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