Synaptic signal

Definition

Synaptic signal involves the transmission of information across a synapse from one neuron to another using chemical messengers called neurotransmitters. It is a crucial mechanism for communication within the nervous system, facilitating responses and actions.

5 Must Know Facts For Your Next Test

1. Synaptic signaling occurs at specialized junctions called synapses where neurons communicate with each other or with target cells.
2. Neurotransmitters released from the presynaptic neuron bind to receptors on the postsynaptic cell, initiating a response in the latter.
3. The process includes steps such as neurotransmitter release, receptor binding, and subsequent cellular response.
4. Common neurotransmitters involved include acetylcholine, dopamine, serotonin, and glutamate.
5. Synaptic signals can be excitatory or inhibitory depending on the type of neurotransmitter and receptor involved.

Review Questions

Related terms

Neurotransmitter: Chemical messengers that transmit signals across a synapse from one neuron to another.

Synapse:

A junction between two neurons, consisting of a presynaptic ending that contains neurotransmitters and a postsynaptic ending that has receptor sites.

Receptor:

Protein molecules on the surface of cells that bind specific molecules like neurotransmitters, initiating a cellular response.