In a Mixed Lymphocyte Reaction, T Cells from Individual a Make

question 9

Multiple Choice

In a mixed lymphocyte reaction, T cells from individual A make a robust response to antigen-presenting-cells from individual B, as long as the two individuals express different alleles of MHC molecules. Estimates indicate that up to 10% of the T cells from individual A may contribute to this response. If one performed this assay using responder T cells from a child and antigen-presenting cells from one parent, the result would be:

• A) A massive proliferative response made by the antigen-presenting cells of the parent
• B) A very weak response by the child's T cells, involving only 0.1% of their T cells
• C) The complete absence of any proliferative response by the child's T cells
• D) A robust cytolytic response that kills all of the parent's antigen-presenting cells
• E) A robust response by the child's T cells

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Definitions:

Reaction Formation

A defense mechanism where an individual expresses feelings that are the opposite of their unconscious desires.

Phallic Stage

A stage in Freudian psychosexual development occurring roughly between the ages of three and six, where the libido is focused on the genital area.

Personal Unconscious

A term by Carl Jung referring to all information that is present within an individual’s mind, but not readily available to conscious awareness.

Unconscious

For Freud, the primary motivating force of human behavior, containing repressed memories as well as instincts, wishes, and desires that have never been conscious.