CD8 Is a Protein That Functions as a Coreceptor for a Subset

question 15

Multiple Choice

CD8 is a protein that functions as a coreceptor for a subset of T cells and plays a significant role in all of the following EXCEPT:

• A)Recognition of peptide antigen bound to class I MHC molecules
• B)Maturation of MHC class I-restricted T cells
• C)Infection of T cells by human immunodeficiency virus (HIV)
• D)Signaling via Lck tyrosine kinase to initiate T cell activation
• E)Strengthening the binding of T cells to antigen-presenting cells,albeit with low affinity

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Definitions:

Retina

The light-sensitive layer of tissue at the back of the eye that converts light into neural signals, which are sent to the brain for visual recognition.

Visual Information

Data or knowledge acquired through the sense of sight.

Feature Detectors

Neurons in the brain that identify specific features of a stimulus, such as shape, angle, or movement.

Ganglion Cells

Neurons located in the retina that receive visual information from photoreceptors and transmit it to the brain via the optic nerve.