The Lymphatic System and Immunity
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Questions and Answers

What is the primary function of the lymphatic system?

  • Transporting oxygen from the lungs to the blood
  • Filtering waste products from the blood
  • Draining excess fluid and protein from the interstitial tissue back into the blood (correct)
  • Producing and circulating red blood cells

What is the relationship between plasma, interstitial fluid, and lymph?

  • Plasma becomes interstitial fluid once it leaves the lymphatic vessels
  • Plasma and interstitial fluid are the same
  • Lymph is formed when interstitial fluid flows through the lymphatic vessels (correct)
  • Interstitial fluid contains more protein than plasma

Where do lymphatic vessels originate?

  • In the central nervous system and bone marrow
  • In the gastrointestinal tract
  • Only in avascular tissue
  • In spaces between the cells called lymph capillaries (correct)

What is the composition of lymph in comparison to plasma?

<p>Lymph contains less protein than plasma (C)</p> Signup and view all the answers

What is the role of lymphocytes in the body?

<p>Protecting the body through immune responses (B)</p> Signup and view all the answers

Why do larger protein molecules not easily filter through the walls of capillaries?

<p>The cells that form the capillary walls restrict their passage (A)</p> Signup and view all the answers

Which of the following statements about lymphatics is true?

<p>Lymphatics have thicker walls and fewer valves than veins (C)</p> Signup and view all the answers

What is the function of the hilus within a lymph node?

<p>It is where blood vessels and efferent lymphatic vessels leave the node (A)</p> Signup and view all the answers

Where are lymphocytes found in the body?

<p>Scattered in the linings of the gastrointestinal, respiratory, urinary, and reproductive tracts (B)</p> Signup and view all the answers

What is the role of the medulla in a lymph node?

<p>It contains macrophages and plasma cells (A)</p> Signup and view all the answers

Which statement about tonsils is accurate?

<p>Tonsils are arranged in a ring at the junction of the oral cavity and pharynx (D)</p> Signup and view all the answers

What is a significant function of the spleen?

<p>Filtration of lymph (B)</p> Signup and view all the answers

How does lymph flow through the lymph nodes?

<p>Efferent lymphatic vessels $ ightarrow$ Sinuses $ ightarrow$ Afferent lymphatic vessels (C)</p> Signup and view all the answers

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