Question 1

Which of the following best describes the primary function of lymphatic vessels in the human body?

Accepted Answer

They act as a drainage network to transport lymph fluid and return interstitial fluid to the bloodstream.

Question 2

A patient has a blockage in their right lymphatic duct. Which of the following regions would most likely experience lymphatic fluid accumulation (edema)?

Accepted Answer

Right upper extremity and right side of the head and neck

Question 3

Which of the following correctly lists the order of lymph flow from the tissues back to the bloodstream?

Accepted Answer

Lymphatic capillaries → lumbar trunks → cisterna chyli → thoracic duct → subclavian vein

Question 4

Which of the following statements about the thymus is correct?

Accepted Answer

It is a bilobed organ located between the sternum and aorta, where T lymphocytes mature and learn to distinguish self from non-self.

Question 5

Which of the following best explains why lymphatic vessels contain valves?

Accepted Answer

To ensure the unidirectional flow of lymph fluid toward the heart and prevent backflow into tissues

Question 6

A child undergoes a splenectomy (removal of the spleen) after an accident. Which of the following consequences is most likely?

Accepted Answer

Decreased ability to filter bloodborne pathogens and increased susceptibility to infections

Question 7

Which of the following is NOT a function of the innate immune system's first line of defense?

Accepted Answer

Production of antibodies specific to pathogens

Question 8

During a bacterial infection, which sequence correctly describes the steps of phagocytosis?

Accepted Answer

Phagocyte adheres to microbe → phagocyte engulfs microbe → phagocytic vesicle fuses with lysosome → microbe is killed and broken down → indigestible particles eliminated

Question 9

Which of the following best describes the role of interferons in the immune response?

Accepted Answer

They are produced in response to viral infections and help neighboring cells resist viral replication.

Question 10

A patient with a genetic deficiency in complement proteins would most likely have problems with which of the following immune processes?

Accepted Answer

Opsonization, inflammation, and cell lysis

Question 11

Which of the following is a correct match between a cardinal sign of inflammation and its physiological cause?

Accepted Answer

Rubor (redness) – increased blood flow due to vasodilation

Question 12

Which chemical acts on the hypothalamus to raise the body's temperature set point during fever?

Accepted Answer

Prostaglandins

Question 13

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

Accepted Answer

It creates a hostile environment for pathogens and enhances the body's immune defenses.

Question 14

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

Accepted Answer

The adaptive immune response exhibits specificity, diversity, and memory, while the innate immune response does not.

Question 15

Which of the following best describes the role of MHC proteins in the immune system?

Accepted Answer

They encode antigen-presenting molecules that display foreign peptides to T cells.

Question 16

A patient is exposed to a pathogen for the second time. Which cell type is primarily responsible for the rapid and robust antibody response?

Accepted Answer

Memory B cells

Question 17

Which region of an antibody molecule is responsible for binding to antigens?

Accepted Answer

Variable region

Question 18

Which antibody class is most abundant in mucus, tears, saliva, and semen, providing protection at mucosal surfaces?

Accepted Answer

IgA

Question 19

Which of the following best describes the process of opsonization?

Accepted Answer

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

Question 20

A patient is unable to produce helper T cells. Which of the following immune functions would be most directly impaired?

Accepted Answer

Secretion of cytokines that enhance other immune responses

Lymphatic System & Immunity Study Guide – Step-by-Step Guidance

Study Guide - Practice Questions

Study Guide - Flashcards