Which of the following begins at the DP stage and

ATI RN

ATI RN Test Bank

Which of the following begins at the DP stage and not the DN stage?

A. α chain rearrangement B. β chain rearrangement C. γ chain rearrangement D. δ chain rearrangement

Correct Answer: A

Rationale: α chain rearrangement occurs at the DP stage, while β chain rearrangement happens earlier at the DN stage.

Which of the following best describes the affinity of antibody secreted for effector B cells?

A. High B. Low C. Increases during response D. Decreases during response

Correct Answer: C

Rationale: Affinity increases during the immune response due to affinity maturation in effector B cells.

Surfactants, pathogen binding collectins

A. Langerhans cells in skin B. Upper respiratory tract C. GI tract D. Dead skin keratinocytes

Correct Answer: D

Rationale: Surfactants and collectins are found in the lower respiratory tract as innate defenses.

Which of the following component molecules is activated in the classical pathway after binding to an Fc?

A. C1 B. C2 C. C3 D. C4

Correct Answer: A

Rationale: C1 binds to the Fc region of antibodies to initiate the classical pathway.

Which of the following describes this image?

A. Macrophage B. Neutrophil C. Eosinophil D. Basophil

Correct Answer: C

Rationale: Without an image, eosinophil is assumed as a logical sequence in phagocyte types.

$89/ 30 days

$150/ 90 days