Multiple Choice
When under the influence of a stimulant, you are likely to be in a state of
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5. Consciousness and Sleep
Sleep
Multiple Choice
Which of the following statements about the circadian rhythm is true?
A
It consists of the changes in a person's heartbeat throughout the stages of sleep.
B
It is a cycle controlled by the hippocampus.
C
It is a cycle that takes about a day to complete.
D
It is when most dreams occur.
Verified step by step guidance1
Understand the concept of circadian rhythm: It is a natural, internal process that regulates the sleep-wake cycle and repeats roughly every 24 hours.
Identify the key components of circadian rhythm: It is primarily influenced by external cues like light and temperature, and is controlled by the suprachiasmatic nucleus in the hypothalamus, not the hippocampus.
Evaluate each statement: The first statement about heartbeat changes is incorrect as circadian rhythm is not specifically about heartbeat changes during sleep.
Consider the second statement: The hippocampus is involved in memory, not in controlling circadian rhythms, making this statement incorrect.
Analyze the third statement: The circadian rhythm indeed takes about a day to complete, making this the correct statement. The fourth statement about dreams is incorrect as dreams are associated with REM sleep, not directly with circadian rhythm.
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