The Secondary Signal Needed for T_H0 Helper Cells to Differentiate

question 15

Multiple Choice

The secondary signal needed for T_H0 helper cells to differentiate into either T_H1 cells or T_H2 cells is the crosslink between:

• A) CD154 (on T_H0 helper cells) and CD40 (on APC cell)
• B) MHC I (on T_H0 helper cells) and B7 (on APC cell)
• C) CD4 (on T_H0 helper cells) and MHC II (on APC cell)
• D) CD8 (on T_H0 helper cells) and MHC I (on APC cell)
• E) CD28 (on T_H0 helper cells) and B7 (on APC cell)

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Definitions:

Psychoanalytic Theory

A framework for understanding human psychology that emphasizes unconscious conflicts and past experiences as determinants of behavior.

Defense Mechanisms

Unconscious psychological strategies employed to protect oneself from anxiety and to manage emotional conflict and internal or external stressors.

Anxiety

A mood of unease or nervousness, often due to something happening soon or because the consequence is unknown.

Freud

Sigmund Freud, recognized for his theories on the unconscious mind and the development of psychoanalytic therapy.