$$20\ \text{liters (plasma released)} = 17\ \text{liters (reabsorbed)} + 3\ \text{liters (drained by lymphatic system)}$$

Question 1

Which of the following best describes the function of the lymphatic capillaries in the small intestine?

Accepted Answer

They transport dietary lipids and fat-soluble vitamins to the bloodstream.

Question 2

A patient presents with swelling in the lower limbs due to blockage of lymphatic vessels. Which term best describes this condition?

Accepted Answer

Lymphedema

Question 3

Which of the following is TRUE regarding the flow of lymph in the human body?

Accepted Answer

Lymph flows through vessels due to skeletal muscle contraction and breathing.

Question 4

Which equation best represents the daily movement of plasma in human tissues?

Accepted Answer

$$20\ 	ext{liters (plasma released)} = 17\ 	ext{liters (reabsorbed)} + 3\ 	ext{liters (drained by lymphatic system)}$$

Question 5

Which of the following is NOT a primary lymphoid organ?

Accepted Answer

Spleen

Question 6

A lymphocyte that has left the thymus but has not yet encountered its specific antigen is best described as:

Accepted Answer

A naïve T cell

Question 7

Which of the following cells is responsible for the rapid, non-specific response to pathogens and is part of the innate immune system?

Accepted Answer

Neutrophil

Question 8

Which lymphatic duct drains lymph from the left side of the head, left thorax, left upper limb, and lower limbs?

Accepted Answer

Thoracic duct

Question 9

Which of the following best describes the role of helper T cells (CD4+ T cells) in the immune response?

Accepted Answer

They activate B cells, macrophages, and cytotoxic T cells.

Question 10

Which of the following is a correct sequence for lymph circulation?

Accepted Answer

Interstitial fluid → Lymph capillary → Afferent lymph vessel → Lymph node → Efferent lymph vessel → Lymph trunk → Lymph duct → Subclavian vein

Question 11

Which of the following is TRUE regarding the difference between myeloid and lymphoid cells?

Accepted Answer

Lymphoid cells give rise to T cells, B cells, and natural killer cells.

Question 12

Which of the following structures is NOT found in lymphatic capillaries?

Accepted Answer

Smooth muscle

Question 13

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

Accepted Answer

Filtering blood and removing damaged red blood cells

Question 14

Which of the following best describes the function of Peyer's patches?

Accepted Answer

They mount immune responses against ingested substances in the small intestine.

Question 15

Which of the following is TRUE about the adaptive immune response?

Accepted Answer

It is slow but highly specific and effective.

Question 16

Which of the following cells is responsible for immunological surveillance and destruction of altered or virus-infected cells?

Accepted Answer

Natural killer cell

Question 17

Which of the following is a characteristic of lymphoid nodules?

Accepted Answer

They consist of dense clusters of lymphocytes without a capsule.

Question 18

Which of the following is the correct function of plasma cells?

Accepted Answer

They secrete antibodies.

Question 19

Which of the following is TRUE regarding the lymphatic drainage of the body?

Accepted Answer

The thoracic duct drains lymph from most of the body except the upper right quadrant.

Question 20

Which of the following is a function of regulatory T cells?

Accepted Answer

They suppress the response of B cells and other T cells to antigens.

Anatomy and Physiology of the Lymphatic and Immune Systems

Study Guide - Practice Questions