Answer:
Kandel and Schwartz have a very crucial role played in memory. They have conduct research on memory. In sea slug aplysia, the researcher focused and observed the changes in the neuron in the brain during learning.
When the learning occurs in sea slug, during that process sea slug releases a serotonin neurotransmitter into the specific synapse. The neurotransmitter that released into a specific synapse, these synapses become more efficient during transmitting signals. It plays a role in memory.