A Nonfunctional CD4 Protein on a Helper T Cell Would

question 74

Multiple Choice

A nonfunctional CD4 protein on a helper T cell would result in the helper T cell being unable to

• A)respond to T-independent antigens.
• B)lyse tumour cells.
• C)stimulate a cytotoxic T cell.
• D)interact with a class I MHC-antigen complex.
• E)interact with a class II MHC-antigen complex.

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Definitions:

Pulmonary Edema

The accumulation of fluid in the lungs' air sacs, leading to breathing difficulties.

Respiratory Membrane

The thin barrier through which gas exchange occurs between the alveolar air and the blood in the lungs.

Alveolar Epithelium

The thin layer of cells that lines the alveoli (air sacs) in the lungs, playing a key role in the exchange of oxygen and carbon dioxide.

Vital Capacity

Greatest volume of air that can be exhaled from the lungs after a maximum inspiration.