To what does the TCR of a helper T cell bind?

ATI RN

ATI RN Test Bank

A. antigens presented with MHC I molecules B. antigens presented with MHC II molecules C. free antigen in a soluble form D. haptens only

Correct Answer: B

Rationale: Helper T cells bind MHC II ; MHC I is for cytotoxic T cells.

T-cells and B-cells are

A. phagocytes B. antibodies C. lymphocytes D. part of the complement

Correct Answer: C

Rationale: T and B cells are lymphocytes, key to adaptive immunity, not phagocytes or antibodies.

Which of these immune cells are able to quickly respond post any subsequent encounter with the same antigen?

A. helper T cells B. memory cells C. plasma cells D. basophil

Correct Answer: B

Rationale: Memory cells enable rapid responses to previously encountered antigens.

The lymphatic system plays a crucial role in immune defense by:

A. Regulating blood pressure B. Filtering red blood cells C. Producing insulin D. Transporting immune cells and antibodies

Correct Answer: D

Rationale: It transports immune cells and antibodies to fight infection.

What is the primary function of the cisterna chyli in the lymphatic system?

A. Filtration of lymph B. Storage of lymph C. Transporting lymph to the heart D. Producing lymphocytes

Correct Answer: B

Rationale: The cisterna chyli stores lymph before it enters the thoracic duct.

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