Brain Final Exam Questions and Answers.

Brain Final Exam Questions and Answers




Brain Final Exam Questions and Answers
Question 1
endogenous circannual rhythms

Correct Answer
internal mechanisms that operate on an annual or yearly cycle



Question 2
What cycle involves wakefulness and sleep and regulates the frequency of eating and
drinking, body temperature, secretion of hormones, urination and sensitivity to
drugs?
Correct Answer
endogenous cycles/ circannual rhythms



Question 3
purpose of circadian rhythm
Correct Answer
to keep our internal workings in phase with the outside world



Question 4
Why is the circadian rhythm biologically useful?
Correct Answer
evolutionary - hunting and gathering
now - most awake when the sun is out, when we would be working, etc



Question 5
Human circadian clock generates a rhythm slightly longer than ______________ when it
has no ________________ cues to set it
Correct Answer
24 hours, external




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, Brain Final Exam Questions and Answers




Question 6
What stimulus resets the circadian rhythm?
Correct Answer
Zeitgeber - german word meaning "time giver"



Question 7
What are ways to reset the circadian rhythm?
Correct Answer
sunlight, watching tides of ocean, watching sun set and rise, time of meals,
temperature of environment



Question 8
sleep hormones influence mood with ________ pleasant mood at 5-6 am and ________
pleasant mood at late afternoon to early evening
Correct Answer
least, most



Question 9
What happens when we use stimuli other than sunlight to reset circadian rhythm?
Correct Answer
depression, irritability, impaired job performance



Question 10
T/F circadian rhythms intersect with culture
Correct Answer
TRUE
- think spain, people eat dinner and stay up later




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, Brain Final Exam Questions and Answers




Question 11
jet lag
Correct Answer
a disruption of circadian rhythms due to crossing time zones
- your internal clock is not matching the external time
- can affect cognitive skills such as attention and memory



Question 12
Traveling west phase "________" our circadian rhythms

Correct Answer
delays



Question 13
Traveling east phase "________" our circadian rhythms
Correct Answer
advances
- losing time here, typically harder



Question 14
T/F circadian rhythms remain consistent despite lack of environmental cues indicating
the time of day.
Correct Answer
True!
This is why night shift workers never fully adjust



Question 15
Night-shift workers:
Correct Answer
- tend to have more accidents than day shift workers
- have increased chance of diabetes, metabolic disorders, and cardiac disease




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, Brain Final Exam Questions and Answers




Question 16
What is happening neurologically to help us set our biological clocks?
Correct Answer
the suprachiasmatic nucleus (SCN)



Question 17
What is the suprachiasmatic nucleus (SCN)?
Correct Answer
a part of the hypothalamus and the main control center of the circadian rhythms of
sleep and temperature



Question 18
where is the SCN located
Correct Answer
right above the optic chiasm



Question 19
What does damage to the SCN result in
Correct Answer
less consistent body rhythms that are no longer synchronized to environmental
patterns of light and dark



Question 20
The SCN generates circadian rhythms itself in what manner?
Correct Answer
in a genetically controlled, unlearned manner




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