Activated helper T cells release regulatory molecu

ATI RN

ATI RN Test Bank

Activated helper T cells release regulatory molecules called

A. histamines B. antibodies C. pus D. lymphokines

Correct Answer: D

Rationale: Helper T cells release lymphokines like cytokines; not histamines or antibodies .

The lymph nodes of the axillary region receive lymph mainly from the

A. scalp and face B. arm and mammary gland C. thoracic viscera D. abdominal viscera

Correct Answer: B

Rationale: Axillary lymph nodes drain the arm and mammary gland, not the scalp or viscera.

Which of the following possess Class II MHC antigens?

A. antigen-presenting cells B. erythrocytes C. cardiac muscle cells D. simple columnar epithlial cells in the digestive tract

Correct Answer: A

Rationale: Antigen-presenting cells (e.g., macrophages) express MHC-II, not erythrocytes or muscle cells.

Lymphocytes are of two types, they are

A. T-cells and erythrocytes B. Erythrocytes and Platelets C. T-cells and Platelets D. T-cells and B-cells

Correct Answer: D

Rationale: Lymphocytes include T and B cells, key to adaptive immunity, not erythrocytes or platelets.

Lymphatic vessels are responsible for absorbing dietary fats from which organ?

A. Stomach B. Small intestine C. Liver D. Kidneys

Correct Answer: B

Rationale: Lymphatic vessels (lacteals) in the small intestine absorb dietary fats.

$89/ 30 days

$150/ 90 days