Which statement is true of dopamine receptors?
A. Dopamine receptors are metabotropic.
B. Dopamine receptors are ionotropic.
C. D1 receptors are located on the presynaptic membrane.
D. D2 receptors are found only on postsynaptic membranes.
Answer: A
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A researcher records the hair pulling behavior of three different children in a classroom and implements treatment at a different time for each child. The researcher is using a(n) _____________ design
a. multiple-baseline-across-behaviors b. multiple-baseline-across-subjects c. alternating-treatments d. changing-criterion
The rods of the retina
a. number about 120 million in each eye and are found mainly in the periphery of the eye. b. are specialized for color sensations and detecting fine details. c. function best in bright light. d. are characterized by all of these.
During the period of the embryo, the muscles, circulatory system, and bones develop from the
a. endoderm, the inner layer of the embryonic disk. b. mesoderm, the middle layer of the embryonic disk. c. ectoderm, the outer layer of the embryonic disk. d. the placenta, which connects the embryo to the mother.
Reflecting the gender stereotypes of his age group, 4-year-old Youssef is likely to say that
A) it is OK for boys to dress up in skirts or jewelry. B) girls cannot be doctors or police officers. C) girls can grow up to be anything they want to be. D) it is OK if boys want to play with dolls.