Chapter 16 Circulation
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Questions and Answers

Which substances can pass through the intercellular cleft in capillaries?

  • Proteins
  • Water soluble substances (correct)
  • Glucose
  • Lipid soluble substances

    • Which organs have capillaries with fenestrated endothelial cells?

  • Kidney (correct)
  • Skin
  • Heart
  • Skeletal muscle

    • What is the composition of interstitial fluid?

  • Similar to plasma except for proteins (correct)
  • Mainly water molecules
  • Mainly proteoglycan filaments
  • Mainly collagen

    • What are the forces favoring filtration across capillaries?

    <p>Capillary pressure (Pc)</p> Signup and view all the answers

    What is the net movement of fluid from the arterial end of a capillary into the interstitial space?

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

    What is the net movement of fluid from the venous end of a capillary into the interstitial space?

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

    What is the role of the lymphatic system?

    <p>Collect fluid and protein from interstitial spaces</p> Signup and view all the answers

    What causes an increase in interstitial fluid pressure?

    <p>Increased lymph flow</p> Signup and view all the answers

    What is the function of the lymphatic pump?

    <p>Contract smooth muscle cells</p> Signup and view all the answers

    Why does the lymph flow curve plateau?

    <p>Valves in lymph channels</p> Signup and view all the answers

    Which of the following is responsible for controlling blood flow to each tissue area in the microcirculation?

    <p>Small arterioles</p> Signup and view all the answers

    What is the suitable characteristic of capillaries for solute and water transfer?

    <p>High surface area</p> Signup and view all the answers

    Which of the following substances has the highest molecular weight?

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

    What is the diameter range of capillaries?

    <p>4-5 µm</p> Signup and view all the answers

    Which of the following substances can directly diffuse through the capillary membrane?

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

    Which component of the microcirculation is responsible for recruiting more capillaries if there is increased demand?

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

    What is the thickness of the capillary wall?

    <p>0.5 µm</p> Signup and view all the answers

    Which component of the microcirculation has a single endothelial cell layer and no vascular smooth muscle cells?

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

    Which of the following substances has the lowest molecular weight?

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

    Which component of the microcirculation is larger than arterioles and has a weaker muscular coat?

    <p>Small venules</p> Signup and view all the answers

    Which of the following factors affect lymph flow?

    <p>All of the above</p> Signup and view all the answers

    What is the function of the lymphatic pump?

    <p>To drain lymphatic fluid</p> Signup and view all the answers

    What is the capillary filtration coefficient (Kf)?

    <p>A measure of capillary filtration</p> Signup and view all the answers

    What can cause extracellular edema?

    <p>Increased capillary filtration</p> Signup and view all the answers

    What can lead to swollen gums?

    <p>Poor dental hygiene</p> Signup and view all the answers

    What is the role of the lymphatic system?

    <p>To maintain tissue fluid balance</p> Signup and view all the answers

    What can cause allergic response?

    <p>Increased capillary permeability</p> Signup and view all the answers

    What can result in lymphatic obstruction?

    <p>All of the above</p> Signup and view all the answers

    What can lead to fluid retention?

    <p>Increased capillary pressure</p> Signup and view all the answers

    What can cause protein loss through urine?

    <p>Decreased plasma colloid pressure</p> Signup and view all the answers

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