Sleep Spindles Are Indicative of Which Stage of Sleep

question 88

Multiple Choice

Sleep spindles are indicative of which stage of sleep?

• A) stage 2
• B) stage 1
• C) REM
• D) stage 4

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Definitions:

Adrenal Cortex

The outer portion of the adrenal gland that produces steroid hormones such as cortisol, which regulates metabolism and the immune response, and aldosterone, which controls blood pressure.

Cortisol

A hormone released by the adrenal glands in response to stress or low blood glucose.

Blood Sugar

The concentration of glucose in the blood, an important energy source for the body's cells.

Hypothalamus-Pituitary-Adrenal Cortex

A major part of the endocrine system that controls reactions to stress and regulates many body processes including digestion, the immune system, mood and emotions.