The Secondary Signal Needed from a T Cell for a B

question 10

Multiple Choice

The secondary signal needed from a T cell for a B cell to differentiate into a plasma cell, is the crosslink between:

• A) CD8 (on T_C cell) with MHC I (on B cell)
• B) CD4 (on T_H cell) with CD40 (on B cell)
• C) MHC II (on T_C cell) with CD4 (on B cell)
• D) CD8 (on T_C cell) with CD40 (on B cell)
• E) CD154 (on T_H cell) with CD40 (on B cell)

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Definitions:

Fissure

An ulcer, split, crack, or tear in the tissue.

Dermis

The thick layer of living tissue below the epidermis that forms the true skin, containing sweat glands, hair follicles, and connective tissue.

Integumentary

Pertaining to the covering of the body, including skin, hair, nails, and related glands, serving as a protective barrier.

Constrict

To narrow; to become smaller because of contraction of a sphincter muscle.