CD4 Count Refers to the Number of

question 25

Multiple Choice

CD4 count refers to the number of

• A) helper T cells present in a cubic millimeter of blood.
• B) killer T cells present in a cubic milliliter of blood.
• C) white blood cells present in the blood.
• D) platelets in the blood.

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Definitions:

Sensation

How our sensory receptors and nervous system take in and depict energies coming from stimuli in our surroundings.

Absolute Threshold

The minimum intensity of a stimulus that one can detect at least 50% of the time.

Sensory Memory

A type of storage that holds sensory information for a very short period of time, usually under one second.

Stimulus Set Point

The threshold at which a stimulus is strong enough to elicit a response or reaction.