Question 1

Which of the following best describes the primary function of the lymphatic system?

Accepted Answer

To maintain fluid homeostasis and support immune defense

Question 2

How do lymphatic vessels differ from blood vessels in their structure and function?

Accepted Answer

Lymphatic vessels have valves to prevent backflow and rely on muscle contractions for movement

Question 3

Which of the following is a key difference between innate and adaptive immunity?

Accepted Answer

Adaptive immunity requires prior exposure to an antigen, while innate immunity does not

Question 4

A patient presents with severe swelling in one arm following breast cancer surgery. What is the most likely cause of this condition?

Accepted Answer

Blockage or removal of lymphatic vessels leading to lymphedema

Question 5

Which lymphoid organ is responsible for the maturation of T cells and is most active during childhood?

Accepted Answer

Thymus

Question 6

Which of the following best describes the role of the spleen in the immune system?

Accepted Answer

It filters pathogens from the blood and destroys old erythrocytes

Question 7

Which of the following statements about lymph is correct?

Accepted Answer

Lymph is formed from interstitial fluid that enters lymphatic capillaries

Question 8

Which of the following is a function of the complement system in innate immunity?

Accepted Answer

Forming membrane attack complexes that lyse pathogens

Question 9

A patient is exposed to a virus for the first time. Which immune response will be activated first?

Accepted Answer

Innate immunity involving surface barriers and phagocytes

Question 10

Which of the following best explains why fever can be beneficial during an infection?

Accepted Answer

It causes the liver and spleen to sequester iron and zinc, limiting pathogen growth

Question 11

Which cell type is primarily responsible for killing virus-infected or cancerous cells by recognizing antigens presented on MHC class I molecules?

Accepted Answer

Cytotoxic T (CD8+) cells

Question 12

Which of the following is a characteristic of mucosa-associated lymphatic tissue (MALT)?

Accepted Answer

It consists of loosely organized clusters of B and T cells in mucous membranes

Question 13

Which of the following best describes the process of opsonization?

Accepted Answer

The coating of pathogens by antibodies or complement proteins to enhance phagocytosis

Question 14

Which of the following is a function of dendritic cells in the immune system?

Accepted Answer

They act as professional antigen-presenting cells to activate B and T cells

Question 15

Which of the following best describes the role of helper T (TH) cells in the immune response?

Accepted Answer

They secrete cytokines that activate and enhance other immune cells

Question 16

Which of the following is true regarding the difference between cell-mediated and antibody-mediated immunity?

Accepted Answer

Cell-mediated immunity targets infected or abnormal cells, while antibody-mediated immunity targets extracellular pathogens

Question 17

Which of the following best explains why allografts are more likely to be rejected than autografts?

Accepted Answer

Allografts have different MHC antigens that can be recognized as foreign by the recipient's immune system

Question 18

Which of the following best describes the function of lacteals in the digestive system?

Accepted Answer

They absorb dietary fats and transport them to the bloodstream

Question 19

A patient receives a vaccine containing inactivated toxins from bacteria. What type of immunity is being developed?

Accepted Answer

Active, antibody-mediated immunity

Question 20

Which of the following best explains the role of major histocompatibility complex (MHC) proteins in the immune response?

Accepted Answer

They present antigen fragments to T cells for immune recognition

Lymphatic and Immune Systems: Structure, Function, and Defense Mechanisms

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