What accounts for the sensitization of the gill-withdrawal reflex in aplysia?
A)Motor neurons release serotonin,which increases the number of vesicles available to release glutamate from the sensory neuron.
B)Motor neurons release glutamate,which increases the number of vesicles available to release serotonin from the interneurons.
C)Interneurons release serotonin,which increases the number of vesicles available to release glutamate from the sensory neuron.
D)Interneurons release glutamate,which increases the number of vesicles available to release serotonin from the sensory neuron.

Question

Quizplus · Accepted Answer

The sensitization of the gill-withdrawal reflex in aplysia is mediated by an increased release of serotonin from modulatory interneurons. This serotonin acts on the sensory neuron, increasing the number of synaptic vesicles available for release of glutamate, which ultimately results in a stronger withdrawal response.

What Accounts for the Sensitization of the Gill-Withdrawal Reflex in Aplysia