Free Anatomy and Physiology Lymphatic and Immune Systems Questions and Answers

Question 1

What is the main function of the lymphatic system?

Accepted Answer

Drain excess interstitial fluid and provide immunity

Answer

The lymphatic system collects and returns interstitial fluid to the blood, absorbs fats from the digestive tract, and is a critical part of the immune system, housing lymphocytes that defend against pathogens.

Question 2

Which organ is the primary site for T-cell maturation?

Accepted Answer

Thymus

Answer

T-cells mature in the thymus, where they are educated to recognize self and non-self cells. Bone marrow produces T-cell precursors, but maturation occurs in the thymus.

Question 3

Which of the following cells are part of the body's innate immune system?

Accepted Answer

Natural killer (NK) cells

Answer

NK cells are part of the innate immune system and attack infected or cancerous cells without the need for prior exposure. B and T cells belong to the adaptive immune system, and plasma cells are antibody-secreting B cells.

Question 4

What is the role of the spleen in the lymphatic system?

Accepted Answer

Filtering blood and removing old red blood cells

Answer

The spleen filters the blood, removes old or damaged red blood cells, and provides an environment for immune cells to respond to blood-borne pathogens.

Question 5

What is an antibody?

Accepted Answer

A molecule produced by B cells to neutralize antigens

Answer

Antibodies are proteins secreted by activated B cells (plasma cells) that bind to specific antigens, neutralize pathogens, and mark them for destruction by other immune cells.

Anatomy and Physiology Practice Test

Anatomy and Physiology Practice Test

Free Anatomy and Physiology Lymphatic and Immune Systems Questions and Answers