Smoking cigarettes can impact a person's mood and behavior because an active ingredient in cigarettes acts as a(n) ______ at a receptor for acetylcholine.
A. enzyme
B. gliotransmitter
C. antagonist
D. agonist
Answer: D
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According to Freud, during middle childhood, psychosexual feelings
a. become repressed. b. resurface. c. are punished. d. express themselves through the Oedipus and Electra complexes.
A resting potential is:
a. an electrical signal that travels along the axon of a neuron b. the small gap that exists between adjacent neurons c. an electrical signal that travels along the dendrites of a neuron d. the tiny electrical charge that exists when a neuron is neither receiving nor sending information
Memories people say they have of their first three years of life are based on ________
a. unconscious memories that float to the surface. b. family stories, photographs, and imagination. c. actual recall of the events. d. a special memory module for early childhood experiences.
If you hold three fingers up in front of you at arm's length, you will not only see three extended digits, but you will also "see" two "Vs" in the negative space between your fingers. According to theories of perception,
what explains why we perceive lines when they are really not present? a. The law of Pragnanz b. Illusory contours c. Perceptual sets d. Unconscious inferences