Capillary Fluid Exchange and Lymphatic System
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Questions and Answers

What is the process by which substances move across the capillary membrane from an area of high concentration to an area of low concentration?

  • Diffusion (correct)
  • Filtration
  • Bulk flow
  • Transcytosis
  • Which process involves the transport of large molecules across the capillary wall inside vesicles?

  • Bulk flow
  • Transcytosis (correct)
  • Osmosis
  • Diffusion
  • What is responsible for the outward force that tends to move fluid from the capillaries into the interstitial fluid?

  • Osmotic pressure inside the capillary
  • Osmotic pressure in the interstitial fluid
  • Hydrostatic pressure inside the capillary (correct)
  • Hydrostatic pressure in the interstitial fluid
  • What is the inward force that tends to move fluid from the interstitial fluid into the capillaries?

    <p>Osmotic pressure in the interstitial fluid</p> Signup and view all the answers

    What is the formula for calculating net filtration pressure (NFP)?

    <p>$NFP = (HPc + OPif) - (HPif + OPc)$</p> Signup and view all the answers

    What term describes an abnormal accumulation of fluid in the interstitial spaces of tissues?

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

    What specifically prevents substances such as bacteria or large proteins from entering the lymphatic vessels?

    <p>Small openings between lymphatic endothelial cells</p> Signup and view all the answers

    Where are discontinuous capillaries most commonly found?

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

    What is the main function of fenestrated capillaries?

    <p>Allowing high volumes of fluid to pass rapidly between plasma and interstitial fluid</p> Signup and view all the answers

    What is the relative permeability of skeletal muscle capillary pores to glucose molecules compared to water molecules?

    <p>0.6 times</p> Signup and view all the answers

    What is the role of transcytosis vesicles in capillary endothelial cells?

    <p>Transporting macromolecules across the cell membrane</p> Signup and view all the answers

    Where are 'tight' junctions between capillary endothelial cells mainly found?

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

    Which body fluid compartment primarily consists of fluid surrounding most cells of the body?

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

    What is the structure entrapping interstitial fluid among proteoglycan filaments called?

    <p>Tissue gel</p> Signup and view all the answers

    What is the relative permeability of capillary pores to albumin molecules compared to water molecules?

    <p>&lt; 1/1000 times</p> Signup and view all the answers

    Which type of capillaries have large gaps and fenestrae?

    <p>'Sinusoidal' capillaries</p> Signup and view all the answers

    What is the main function of transcytosis vesicles in capillary endothelial cells?

    <p>Facilitating the movement of large molecules across the capillary wall inside vesicles</p> Signup and view all the answers

    What specifically prevents substances such as bacteria or large proteins from entering the lymphatic vessels?

    <p>The tight junctions between capillary endothelial cells in the brain</p> Signup and view all the answers

    What is the relative permeability of skeletal muscle capillary pores to glucose molecules compared to water molecules?

    <p>0.6 times</p> Signup and view all the answers

    Where are 'tight' junctions between capillary endothelial cells mainly found?

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

    What is responsible for the outward force that tends to move fluid from the capillaries into the interstitial fluid?

    <p>Partial pressure gradient for the individual gas</p> Signup and view all the answers

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