Peter Is in a Deep Sleep and His Brain Wave

question 286

Multiple Choice

Peter is in a deep sleep and his brain wave pattern consists of low frequency delta waves.Peter is experiencing which stage of sleep?

• A) REM
• B) Stage 3 or 4
• C) Stage 1
• D) Stage 2

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Definitions:

pH

A scale used to specify the acidity or basicity of an aqueous solution, with lower values being more acidic and higher values more basic.

Sphincters

Circular muscles that control the passage of substances through the openings of the body.

Dentin

A calcified tissue that lies beneath the enamel and cementum of teeth, providing structure and sheltering the pulp.

Enamel

The hard, outermost layer of a tooth that protects it from decay.