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Gnesinka [82]
2 years ago
3

In the postsynaptic membrane, the opening of __________ causes inhibitory postsynaptic potentials, while the opening of ________

__ causes excitatory postsynaptic potentials.
Biology
1 answer:
DochEvi [55]2 years ago
5 0

In the postsynaptic membrane, the opening of chloride channels causes inhibitory postsynaptic potentials, while the opening of sodium channels causes excitatory postsynaptic potentials.

Postsynaptic potentials are changes in the membrane potential of the postsynaptic terminal of a chemical synapse. Postsynaptic potentials are graded potentials, and should not be confused with action potentials although their function is to initiate or inhibit action potentials.

They are caused by the presynaptic neuron releasing neurotransmitters from the terminal bouton at the end of an axon into the synaptic cleft. The neurotransmitters bind to receptors on the postsynaptic terminal, which may be a neuron or a muscle cell in the case of a neuromuscular junction. These are collectively referred to as postsynaptic receptors, since they are on the membrane of the postsynaptic cell.

Postsynaptic potentials begin to be terminated when the neurotransmitter detaches from its receptor. The receptor is then free to return to its previous structural state. Ion channels that had been opened by the receptor when the neurotransmitter was bound to it will now close. Once the channels are closed, ions return to their equilibrium states, and the membrane is returned to its equilibrium potential.

Learn more about Postsynaptic potentials here : brainly.com/question/15443816

#SPJ4

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