The binding of neurotransmitter to the postsynaptic...

The binding of neurotransmitter to the postsynaptic receptors in an inhibitory synapse results in $a$ depolarization of the membrane. b. generation of an action potential. c. hyperpolarization of the membrane. $d$. increased permeability of the membrane to sodium ions. $e$ increased permeability of the membrane to calcium ions.

The binding of neurotransmitter to the postsynaptic receptors in an inhibitory synapse results in
$a$ depolarization of the membrane.
b. generation of an action potential.
c. hyperpolarization of the membrane.
$d$. increased permeability of the membrane to sodium ions.
$e$ increased permeability of the membrane to calcium ions.

Key Concepts

Neurotransmitter Binding

This concept involves the process by which chemical messengers, known as neurotransmitters, are released from a neuron and travel across the synapse to bind to specific receptors on a target cell. The binding initiates a series of cellular responses by altering the permeability of ion channels in the postsynaptic membrane, leading to changes in membrane potential.

Inhibitory Synapse

An inhibitory synapse is a type of neural connection that decreases the likelihood of the postsynaptic neuron firing an action potential. When neurotransmitters bind to receptors at these synapses, they typically lead to hyperpolarization of the postsynaptic membrane, which moves the membrane potential further from the threshold needed for action potential initiation.

Postsynaptic Potentials

Postsynaptic potentials are the changes in membrane potential of the postsynaptic cell that occur following the binding of neurotransmitters. These changes can be either excitatory, which depolarizes the membrane and promotes action potential generation, or inhibitory, which hyperpolarizes the membrane and inhibits action potential generation.

Membrane Potential

This refers to the voltage difference across the cell membrane resulting from the distribution of ions on either side. The membrane potential is crucial for the transmission of electrical signals in neurons, and its modulation through hyperpolarization or depolarization determines the cell's excitability.

Ion Channel Permeability

Ion channel permeability is a key factor in how synaptic inputs affect neuronal activity. At inhibitory synapses, the binding of neurotransmitters often leads to the opening of ion channels that allow chloride ions to enter the cell, resulting in a hyperpolarizing effect that makes it less likely for an action potential to occur.

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