Ligand-Gated Ion Channel

A membrane-bound protein that opens or closes in response to the binding of a specific ligand, allowing ions to pass through the membrane

A rapid, temporary change in the membrane potential that propagates along an axon, initiating nerve impulse transmission

Resting Membrane Potential

The voltage difference across the membrane of a cell when it is not actively transmitting an impulse, typically around -70mV.

A decrease in the difference between the inside and outside of the cell membrane, often leading to an action potential

An increase in the difference between the inside and outside of the cell membrane, making it less likely for an action potential to occur

The critical level to which a membrane potential must be depolarized to initiate an action potential

The junction between two nerve cells, where nerve impulses are transmitted from one neuron to another, often via neurotransmitters

A chemical messenger that transmits signals across a synapse from one neuron to another or to a muscle cell

Excitatory Postsynaptic Potential

A temporary depolarization of the postsynaptic membrane caused by the influx of positive ions, making the neuron more likely to fire an action potential

Inhibitory Postsynaptic Potential

A temporary hyperpolarization of the postsynaptic membrane, making the neuron less likely to fire an action potential

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StudyStack Set 1

Human physiology

Term	Definition
Ligand-Gated Ion Channel	A membrane-bound protein that opens or closes in response to the binding of a specific ligand, allowing ions to pass through the membrane
Action Potential	A rapid, temporary change in the membrane potential that propagates along an axon, initiating nerve impulse transmission
Resting Membrane Potential	The voltage difference across the membrane of a cell when it is not actively transmitting an impulse, typically around -70mV.
Depolarization	A decrease in the difference between the inside and outside of the cell membrane, often leading to an action potential
Hyperpolarization	An increase in the difference between the inside and outside of the cell membrane, making it less likely for an action potential to occur
Threshold Potential	The critical level to which a membrane potential must be depolarized to initiate an action potential
Synapse	The junction between two nerve cells, where nerve impulses are transmitted from one neuron to another, often via neurotransmitters
Neurotransmitter	A chemical messenger that transmits signals across a synapse from one neuron to another or to a muscle cell
Excitatory Postsynaptic Potential	A temporary depolarization of the postsynaptic membrane caused by the influx of positive ions, making the neuron more likely to fire an action potential
Inhibitory Postsynaptic Potential	A temporary hyperpolarization of the postsynaptic membrane, making the neuron less likely to fire an action potential

Created by: Tyquanada

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