Postsynaptic

Postsynaptic

The postsynaptic cell is the cell that receives a signal (neurotransmitter) from another neuron at a synapse. The opposite function is performed by the presynaptic cell, which sends the signal. The postsynaptic cell is part of a pair of cells that are in close proximity to each other, separated by a small gap called a synaptic cleft, across which neurotransmitters can travel.

Structure

The postsynaptic cell contains receptors in its membrane that are sensitive to neurotransmitters. These receptors are often ion channels that, when activated, allow ions to flow across the membrane, changing the membrane potential and possibly triggering an action potential.

Function

The function of the postsynaptic cell is to receive and respond to neurotransmitters released by the presynaptic cell. This can result in either an excitatory or inhibitory response, depending on the type of neurotransmitter and receptor involved.

Types

There are two main types of postsynaptic cells: neurons and effector cells. Neurons transmit signals to other neurons, while effector cells carry out the response to the signal, such as contracting a muscle or secreting a hormone.

See also

• Neurotransmitter
• Synapse
• Presynaptic
• Receptor
• Neuron
• Effector cell

Postsynaptic Resources
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