The Notion That Sleep or Wakefulness Is Regulated by a Substance

question 36

Multiple Choice

The notion that sleep or wakefulness is regulated by a substance that circulates within the blood is

• A) proven by the observation that naps reduce sleep time the following night.
• B) unlikely, given that the cerebral hemispheres of a dolphin sleep at different times.
• C) REM and slow-wave sleep appear to involve independent mechanisms.
• D) proven by studies of the dolphin sleep cycle.
• E)proven by studies in which blood transfusion from a tired person to a rested person results in sleep in the recipient.

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Definitions:

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The rate at which something changes as an immediate result of a one-unit increase, often used in economics to describe tax rates or production costs.

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The process of changing or converting something from one form or state to another, often referring to industrial, business, or technological changes.

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