Pressure Ulcers Develop When the Circulation to an Area Is

question 10

True/False

Pressure ulcers develop when the circulation to an area is decreased by the application of pressure to the area.

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Definitions:

Retina

A layer at the back of the eyeball containing cells that are sensitive to light and trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed.

Trichromatic Theory

A theory of color vision proposing that the human eye has three types of receptors with different sensitivities to light wavelengths, responsible for the perception of color.

Cones

Cones are photoreceptor cells in the retina of the eye responsible for color vision and functioning best in relatively bright light.

Retina

A layer of cells located at the back of the eye, responsible for converting light into neural signals that can be processed by the brain to produce visual images.