Cardio 7
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Questions and Answers

What is the term used to describe the intermittent contraction of metarterioles and precapillary sphincters?

  • Perfusion
  • Reabsorption
  • Vasomotion (correct)
  • Filtration

What is the primary factor that determines the degree of opening and closing of the metarterioles and precapillary sphincters?

  • Concentration gradients
  • Oncotic pressure
  • Hydrostatic pressure
  • Oxygen availability (correct)

How do lipid-soluble substances typically cross the capillary wall?

  • Due to hydrostatic pressure
  • Through water-filled clefts or large pores
  • By dissolving in and diffusing across the endothelial membrane (correct)
  • By being actively transported

What is the term used to describe the movement of water from the capillary plasma into the interstitial fluid?

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

What is the term used to describe the fluid present in the interstitium, the spaces between cells?

<p>Interstitial fluid (B)</p> Signup and view all the answers

What is the term used to describe the large amounts of free interstitial fluid that can accumulate, causing edema?

<p>Edema (D)</p> Signup and view all the answers

What is the main function of the lymphatic system in relation to fluid balance?

<p>To take up excess fluid from the tissue (D)</p> Signup and view all the answers

What is the role of the precapillary sphincter?

<p>To open or close the entrance of the capillary (B)</p> Signup and view all the answers

How do water-soluble substances cross the capillary wall?

<p>Through water-filled clefts or large pores (fenestrated capillaries) (A)</p> Signup and view all the answers

What is the function of the metarterioles?

<p>To regulate the blood flow through the capillaries (C)</p> Signup and view all the answers

What is the main difference between the capillary walls of the brain and the liver?

<p>The brain has tight junctions that allow only small molecules to pass, while the liver has wide open clefts between cells (A)</p> Signup and view all the answers

What is the main role of the venules in the microcirculation?

<p>To distribute blood volume within the body (A)</p> Signup and view all the answers

What is the role of the lymphatic system in controlling interstitial fluid protein concentration, volume, and pressure?

<p>Maintains protein concentration, volume, and pressure (B)</p> Signup and view all the answers

What prevents interstitial fluid and protein from exiting lymphatic capillaries?

<p>Flap valves (B)</p> Signup and view all the answers

What is the main determinant of lymph flow within the lymphatic vessels?

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

What function does the lymphatic system perform related to fat transport?

<p>Absorbs fats from intestines and transports to blood stream (C)</p> Signup and view all the answers

Which system is responsible for transporting foreign material to lymph nodes for the development of immune cells?

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

How can changes in Starling forces affect fluid movement?

<p>Influence direction and magnitude of fluid movement (C)</p> Signup and view all the answers

What is the primary force that drives fluid out of the interstitial space into the capillaries?

<p>Interstitial fluid hydrostatic pressure (C)</p> Signup and view all the answers

What is the main function of the lymphatic system in relation to fluid balance?

<p>To remove proteins and large particles from the interstitial spaces (C)</p> Signup and view all the answers

What is the primary force that drives fluid reabsorption from the interstitial space into the capillaries?

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

What is the net filtration pressure at the arterial end of the capillary?

<p>$10$ mmHg (B)</p> Signup and view all the answers

What is the net filtration pressure at the venous end of the capillary?

<p>$-8$ mmHg (D)</p> Signup and view all the answers

What is the primary function of albumin in the body's fluid balance?

<p>To hold water within the intravascular space (D)</p> Signup and view all the answers

What is the role of capillary permeability in fluid movement?

<p>It determines the hydraulic conductance of the capillary wall (B)</p> Signup and view all the answers

What is the approximate amount of fluid that is reabsorbed from the interstitial spaces into the capillaries each day?

<p>17 liters (B)</p> Signup and view all the answers

What is the approximate amount of fluid that is filtered from the capillaries into the interstitial spaces each day?

<p>20 liters (C)</p> Signup and view all the answers

What is the primary force that drives fluid out of the capillaries at the arterial end?

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

What is the primary cause of fluid accumulation in congestive heart failure?

<p>Increased capillary hydrostatic pressure (A)</p> Signup and view all the answers

Which condition is characterized by the leakage of plasma proteins into the intestinal tract, leading to decreased oncotic pressure and fluid accumulation?

<p>Protein-losing enteropathy (C)</p> Signup and view all the answers

What is the primary mechanism behind the development of edema or effusion in cases of local inflammation, such as a snake bite?

<p>Release of vasoactive mediators (C)</p> Signup and view all the answers

Which condition can impair the normal drainage of fluid from tissues, causing fluid accumulation?

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

Which type of edema is characterized by fluid accumulation in the abdominal cavity?

<p>Ascites (D)</p> Signup and view all the answers

What is the term used to describe the abnormal collection of fluid between tissues or in a hollow space?

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

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