Which of the Following Is NOT Associated with Increased Mortality

question 35

Multiple Choice

Which of the following is NOT associated with increased mortality risk?

• A)S leeping more than 9 hours per night
• B)Sleep apnea
• C)Alcohol dependence
• D)Hallucinogenic drug overdose

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Definitions:

Gray Matter

Regions of the brain and spinal cord composed mainly of nerve cell bodies and responsible for processing information.

Myelinated Nerve Fibers

Nerve fibers surrounded by a protective fatty layer called myelin, which increases the speed of signal transmission.

All-or-none Principle

A principle stating that a neuron either fires at full amplitude or not at all, depending on whether the stimulus reaches the threshold level.

CNS

The central nervous system, consisting of the brain and spinal cord, responsible for processing and sending messages to and from the body.