Transmission of the nerve impulse across a synapse is...

Transmission of the nerve impulse across a synapse is accomplished by a. the release of $\mathrm{Na}^{+}$ at the presynaptic membrane. b. the release of neurotransmitters at the postsynaptic membrane. c. the reception of neurotransmitters at the postsynaptic membrane. d. Both a and c are correct.

Transmission of the nerve impulse across a synapse is accomplished by
a. the release of $\mathrm{Na}^{+}$ at the presynaptic membrane.
b. the release of neurotransmitters at the postsynaptic membrane.
c. the reception of neurotransmitters at the postsynaptic membrane.
d. Both a and c are correct.

Key Concepts

Synapse

A synapse is the junction between two neurons, where the transmission of the nerve impulse occurs. It is the specialized gap that allows the chemical signals, called neurotransmitters, to pass from the presynaptic neuron to the postsynaptic neuron, thus facilitating communication within the nervous system.

Neurotransmission

Neurotransmission refers to the process by which nerve signals are communicated across the synapse. This process involves the release of neurotransmitters by the presynaptic neuron, which then travel across the synaptic cleft and interact with receptors on the postsynaptic neuron, leading to the propagation or modulation of the nerve impulse.

Neurotransmitter Release

This concept describes the mechanism by which a neuron releases chemical messengers (neurotransmitters) into the synaptic cleft. Triggered by an arriving action potential and a resulting influx of calcium ions, neurotransmitter vesicles fuse with the presynaptic membrane to release their contents, a critical step in synaptic transmission.

Neurotransmitter Reception

Neurotransmitter reception involves the binding of neurotransmitters to specific receptors on the postsynaptic membrane. This binding initiates a cascade of events that can either excite or inhibit the postsynaptic neuron, thereby playing a key role in the continuation of the neural signal.

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