Question 1

Which of the following is a primary function of the lymphatic system?

Accepted Answer

Drain interstitial fluid and leaked plasma proteins back to blood

Question 2

Which structure is responsible for the maturation of T lymphocytes?

Accepted Answer

Thymus

Question 3

What is the main difference between lymphatic capillaries and blood capillaries?

Accepted Answer

Lymphatic capillaries are open-ended, while blood capillaries form a continuous circuit

Question 4

Which of the following best describes the flow of lymph in the body?

Accepted Answer

Lymph flows toward the heart, assisted by skeletal muscle contraction and respiratory pressure changes

Question 5

Which lymphatic duct drains lymph from the right side of the head, neck, chest, and right arm?

Accepted Answer

Right lymphatic duct

Question 6

A patient develops lymphedema after breast cancer surgery. What is the most likely cause?

Accepted Answer

Removal of lymph nodes, disrupting lymph drainage

Question 7

Which of the following is NOT a similarity between lymphatic collecting vessels and veins?

Accepted Answer

Both carry deoxygenated blood

Question 8

Which of the following is a function of the spleen's red pulp?

Accepted Answer

Destruction of old red blood cells by macrophages

Question 9

Which of the following is a characteristic of innate immunity?

Accepted Answer

It includes physical barriers such as skin and mucous membranes

Question 10

Which of the following is NOT a cardinal sign of inflammation?

Accepted Answer

Numbness

Question 11

Which protein family is responsible for enhancing immune function by forming a membrane attack complex?

Accepted Answer

Complement proteins

Question 12

Which cell type is responsible for killing virus-infected cells by releasing perforins and granzymes?

Accepted Answer

Natural killer (NK) cells

Question 13

Which of the following best describes the process of phagocytosis?

Accepted Answer

Engulfment and digestion of invaders by neutrophils and macrophages

Question 14

Which of the following is true regarding adaptive immunity?

Accepted Answer

It has specificity and memory for antigens

Question 15

Which immunoglobulin class is most abundant in blood and can cross the placenta?

Accepted Answer

IgG

Question 16

Which of the following best describes the role of helper T cells (Th)?

Accepted Answer

They secrete cytokines to stimulate other immune cells

Question 17

Which of the following is an example of an endogenous antigen?

Accepted Answer

Viral protein synthesized within an infected cell

Question 18

What is the main function of memory cells in adaptive immunity?

Accepted Answer

To provide a faster and stronger response upon second exposure to the same antigen

Question 19

Which immunoglobulin class is primarily involved in allergic reactions?

Accepted Answer

IgE

Question 20

A patient with Grave's disease produces autoantibodies that mimic TSH. What is the result?

Accepted Answer

Excessive secretion of T3 and T4

Chapter 20: The Lymphatic System and Immunity – Structured Study Notes

Study Guide - Practice Questions