Jason wants to design a good experiment and be sure there are no uncontrolled variables that change along with the independent variable. In other words, Jason wants to avoid:
a. independent variables
b. dependent variables
c. confounding variables
d. control variables
C
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The proteins PER and TIM, originally discovered in insect but now found in mammals also, influence circadian rhythms by ____
a. building up during the day and declining during sleep b. being transformed into melatonin c. stimulating and inhibiting (respectively) the release of acetylcholine in the cerebral cortex d. providing negative feedback from the muscles to the neurons that innervate them
The maximum longevity for humans appears to be about:
a. 110 years c. 130 years b. 120 years d. 140 years
Which of the following supports a role of dopamine in addiction to drugs?
A. All drugs of abuse bind to dopamine receptors. B. Dopaminergic neurons are located in the cortex of the brain. C. Humans with the greatest drug-related increases in nucleus accumbens dopamine also experienced the most intense effects of drugs. D. Dopaminergic neurons have been identified in the brains of rats, people, and nonhuman primates.
Sounds with frequencies above the range of human hearing are referred to as a. fundamental frequencies
b. pure tones. c. ultrasound. d. infrasound.