Katelyn has put off studying for her test. She is very tired, but still has hours of studying to do. She makes herself a cup of coffee in the hope it will block the effects of __________ as it builds up in the evening

a. melatonin
b. dopamine
c. serotonin
d. adenosine


Answer: D

Psychology

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80 60 50 40

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Which statements correctly describes personality throughout adulthood?

A. Profound changes in social environments can produce fluctuations in personality B. Changes in physiological adaptation produce fluctuations in personality C. Personality will change with age D. There are constant fluctuations in personality

Psychology

The concordance rate for a certain trait refers to the:

number of genes involved in determining variation in the trait among individuals. extent to which variations in the trait among a large group of individuals can be attributed to heredity. degree of similarity between a pair of twins for that trait. relative influence of environmental and biological factors on the trait.

Psychology