Principles of Human Physiology Study Set 1
Quiz 8 :
Synaptic Transmission and Neural Integration
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Q141 Q141 Q141
Information travels through the nervous system along the axons as action potentials. These action potentials must be transmitted across the synaptic cleft. Describe the process whereby an action potential that has entered the axon terminal is able to induce a change in membrane potential in the postsynaptic membrane, following neurotransmitter binding to a metabotropic receptor.
Q143 Q143 Q143
Once an action potential reaches the axon terminal, that depolarization stimulates the release of neurotransmitters that can be modulated by other neurons that synapse with the axon terminal. Describe how neurotransmitters are released from the axon terminal and how that response is altered by axoaxonic synapses.
Q146 Q146 Q146
A number of modified epithelial cells, acting as sensory receptors, innervate a single neuron. Some of these cells release excitatory neurotransmitters, while others release inhibitory neurotransmitters. How are these responses integrated by the neuron to determine whether an action potential will be generated or not?