Match up the receptor type with its action
A) metabotropic; direct opening of an ion channel
B) ionotropic; more time required to open an ion channel
C) metabotropic; G-protein activation leads to activation of a second messenger
D) metabotropic; second messenger effects are specific to opening ion channels
E) metabotropic; rapid and short-lived effects on ion channels
Answer: C
Rationale: In metabotropic receptors, G-protein activation leads to activation of a second messenger.
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a. personally; parallel b. parallel; serial fashion c. parallel; parallel d. serially; serial fashion e. serially; parallel
Imagine that Dr. Walsh measures the heritability of anger in pairs of siblings who are being reared together
She finds a correlation of .15 between pairs of adopted siblings who are biologically unrelated, a correlation of .63 for fraternal twins, and a correlation of .92 for identical twins. These results suggest that A) both the environment and genetics contribute substantially to the variability in anger. B) relative to the influence of genetics, the environment contributes relatively little to variability in anger. C) compared to the impact of the environment, genetics contributes relatively little to variability in anger. D) the shared environment contributes greatly to the variability in anger only among identical twins.