neuronal synapse

Question 1

presynaptic neuron

Answer 1

fires neurotransmitter as a result of an action potential entering its axon terminal

Question 2

postsynaptic neuron

Answer 2

postsynaptic neuron. a neuron to the cell body or dendrite of which an electrical impulse is transmitted across a synaptic cleft by the release of a chemical neurotransmitter from the axon terminal of a presynaptic neuron.

Question 3

synaptic vesicle

Answer 3

In a neuron, synaptic vesicles (or neurotransmitter vesicles) store various neurotransmitters that are released at the synapse. The release is regulated by a voltage-dependent calcium channel. Vesicles are essential for propagating nerve impulses between neurons and are constantly recreated by the cell.

Question 4

voltage gated Ca2+ channel

Answer 4

calcium influx in response to membrane depolarization and regulate intracellular processes such as contraction, secretion, neurotransmission, and gene expression in many different cell types

Question 5

neurotransmitters

Answer 5

a chemical substance that is released at the end of a nerve fiber by the arrival of a nerve impulse and, by diffusing across the synapse or junction, causes the transfer of the impulse to another nerve fiber, a muscle fiber, or some other structure.

Question 6

axon terminal of presynaptic neuron

Answer 6

Nerve impulse release. Neurotransmitters are packaged into synaptic vesicles that cluster beneath the axon terminal membrane on the presynaptic side of a synapse. The axonal terminals are specialized to release the neurotransmitters of the presynaptic cell.

Question 7

synaptic cleft

Answer 7

one neuron releases neurotransmitter molecules into a small space (the synaptic cleft) that is adjacent to another neuron.

Question 8

neurotransmitter receptor

Answer 8

neurotransmitter receptors receive signals that trigger an electrical signal, by regulating the activity of ion channels

Question 9

postsynaptic neuron

Answer 9

electrical impulse is transmitted across a synaptic cleft by the release of a chemical neurotransmitter from the axon terminal of a presynaptic neuron