28. Compared to ionotropic effects, metabotropic effects__________:
a. have more rapid onsets and persist for shorter periods oftime.
b. have less rapid onsets and persist for shorter periods oftime.
c. have more rapid onsets and persist for longer periods oftime.
d. have less rapid onsets and persist for longer periods oftime.
e. both a and c.
29. If the brain of a mammalian subject is bisected into itsright and left hemispheres, revealing ​a lateral view of theinternal structures of the brain, the section would be termed​__________:
​a. a frontal section.
b. a dorsal section.
c. a mid-sagittal section.
d. a dorsal-lateral sagittal section.
30. In terms of anatomical directions, anything directedupwards toward the spinal column of a ​quadrupedal animal standingon all fours is oriented in the __________:
a. ventral direction.
b. lateral direction.
c. frontal direction.
d. dorsal direction.
31. All of the following are examples of important peptideneurotransmitters except ​__________:
a. neuropeptide Y.
b. substance P.
c. Gamma-Amino-Butyric-Acid.
d. endorphin.
32. Prior to the work of Santiago Ramon y Cajal, manyscientists believed that __________:
a. nerves conducted impulses at the speed of light.
b. transmission across a synapse was just as fast astransmission along an axon.
c. the tip of an axon physically merged with the surface ofadjacent neurons.
d. the behavior of nonhuman animals was entirelyreflexive.
e. that the relationship between neurons was magneticallymediated.
