Refer to the Figure, Showing the Typical Sleep Pattern of an Elderly

question 16

Multiple Choice

Refer to the figure, showing the typical sleep pattern of an elderly person.
This pattern shown here is notable because of the

• A) relatively long duration of REM sleep.
• B) short duration of the awakenings.
• C) eight-hour duration.
• D) greatly reduced stage-3 sleep.

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Definitions:

Axons

Long, slender projections of nerve cells (neurons) that transmit electrical impulses away from the neuron body to other cells.

Ganglion Cells

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

Blind Spot

The point in the visual field that corresponds to the lack of light-detecting photoreceptor cells on the optic disc of the retina where the optic nerve passes through.

Visual Clarity

The sharpness and clearness of vision, which allows for the detailed perception of images.