When the neuromodulator protolin is administered to a male blue crab (Callinectes sapidus) at the same time that interneurons that trigger leg waving are being stimulated, the motor output assumes
A) the rhythmic leg waving characteristic of courtship displays.
B) the rhythmic leg waving characteristic of backwards swimming.
C) the posture associated with sideways walking.
D) the posture associated with spread of the front claws.

Question

Quizplus · Accepted Answer

Protolin, when administered alongside the stimulation of interneurons responsible for leg waving, enhances the motor output to produce the rhythmic leg waving seen in courtship displays of male blue crabs. This suggests that protolin plays a role in modulating behaviors associated with mating.

When the Neuromodulator Protolin Is Administered to a Male Blue