Sensitization of the gill-withdrawal reflex in Aplysia, in contrast to habituation, has been shown to require
A) facilitating interneurons, which release serotonin onto the axon terminal of the sensory neuron.
B) motor neurons, which generate stronger than normal action potentials.
C) sensory neurons, which allow less Ca++ into the cell.
D) synaptic vesicles, which compensate for repeated stimulation by hyperpolarizing the sensory neuron.

Question

Quizplus · Accepted Answer

Sensitization of the gill-withdrawal reflex in Aplysia involves the release of serotonin by facilitating interneurons onto the axon terminal of the sensory neuron, which enhances the synaptic connection between the sensory and motor neurons, leading to an increased response.

Sensitization of the Gill-Withdrawal Reflex in Aplysia, in Contrast to Habituation