NK Cells Do All of the Following EXCEPT

question 59

Multiple Choice

NK cells do all of the following EXCEPT

• A)bind to Fc regions of bound antibodies.
• B)kill cells not expressing MHCI.
• C)participate in antibody dependent cell cytotoxicity.
• D)become activated by TH-2 cells.
• E)comprise 10-15% of circulating lymphocytes.

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Definitions:

Carbon Dioxide

A colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is naturally present in air and is absorbed by plants in photosynthesis.

Bicarbonate Ions

Ions that act as a buffer in bodily fluids to maintain pH balance and are involved in the carbon dioxide transport and delivery system.

Carbonic Acid

A weak acid formed in solution when carbon dioxide is dissolved in water, playing a significant role in the carbon cycle and respiratory gas exchange.

Hypercapnia

Higher than normal levels of carbon dioxide in the blood or tissues.