Elevated levels of the chemical adenosine in the brain triggers ________.
A) insomnia
B) wakefulness
C) sleepiness
D) a hypnotic-like trance
Correct Answer:
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Q2: The hormone epinephrine reaches peak levels in
Q3: A biological cycle, or rhythm, that is
Q5: Each of the following is true of
Q6: The naturally occurring chemical _ appears to
Q7: Mental states that differ noticeably from normal
Q10: Each of the following is true of
Q11: Which of the following chemicals has been
Q11: A hormone that peaks during the night
Q15: All of the thoughts and feelings we
Q18: The hallmark of normal waking consciousness is
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