A stimulus applied to the surface of the cerebellar cortex activates a beam of parallel fibers. This produces:
A. a wave of inhibited Purkinje cells in line with the parallel fiber beam
B. waves of excited Purkinje cells that flank the parallel fiber beam
C. a wave of excited basket and stellate cells in line with the parallel fiber beam
D. waves of excited basket and stellate cells that flank the parallel fiber beam
E. complex spikes in Purkinje cells in line with the parallel fiber beam
ANS: C
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Carla was startled by an extremely loud bang that sounded like a gunshot. Her heartbeat accelerated rapidly. When she found that the noise was only a car backfiring, she felt greatly relieved but her heart kept beating heavily for over half an hour. Why did this happen?
What will be an ideal response?
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Identify the statement that best differentiates gray matter and white matter.
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