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Which cell must have action potentials to produce one or more action potentials in the postsynaptic cell?
Wiki User
∙ 10y ago
A neuron (nerve cell) receives dendritic input in order to generate action potentials to transmit signals of the same. After the action potential triggers release of neurotransmitters in the axonal terminal of that neuron, those neurotransmitters propagate the signal forward to the next neuron, and so forth.
Wiki User
∙ 10y ago
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What happens when presynaptic cell's produce action potentials?
When presynaptic cells produce action potentials, it triggers the opening of voltage-gated calcium channels in the presynaptic membrane. This influx of calcium ions into the presynaptic cell triggers the release of neurotransmitter molecules from small, membrane-bound vesicles. The released neurotransmitters then diffuse across the synapse and bind to receptors on the postsynaptic cell, generating a response in the postsynaptic cell.
Can neuroglia cells transmit action potentials from one nerve cell to another?
No.
Do axons carry action potentials away from the cell body?
The areas that have had the action potential are refractory to a new action potential.
How do neurotransmitters initiate action potentials?
Neurotransmitters can help bring another neuron to the point where it initiates an action potential by binding to postsynaptic receptor sites. If the receptors are the type that allow positively charged ions to flux through the cell membrane, and if this happens on a large enough scale (i.e., multiple sites are hit at once), then the probability of an action potential occurring becomes very high.
What are the electrical events conducted along the cell plasma membrane that stimulate contraction?
Action potentials
What do intercalated discs transfer from cell to cell?
action potentials, ionic currents, the force of contraction and ionic currents and action potentials only
How does the end plate potential differ from a EPSP on a post synaptic cell?
End plate potential is the change in potential from neurotransmitters. It can be excitatory or inhibitory. If the action potential wants to continue, it will be excitatory and vice versa. It can be additive, if more action potentials are fired it will increase the end plate potential. An action potential is an all or none response. It will either proceed or it will not proceed depending on the terms of the threshold. It cannot be additive, because there is an absolute refractory period where no additional action potentials can be fired.
What happens when presynaptic cell's produce action potentials?
When presynaptic cells produce action potentials, it triggers the opening of voltage-gated calcium channels in the presynaptic membrane. This influx of calcium ions into the presynaptic cell triggers the release of neurotransmitter molecules from small, membrane-bound vesicles. The released neurotransmitters then diffuse across the synapse and bind to receptors on the postsynaptic cell, generating a response in the postsynaptic cell.
Can neuroglia cells transmit action potentials from one nerve cell to another?
No.
Do axons carry action potentials away from the cell body?
The areas that have had the action potential are refractory to a new action potential.
What is the difference between presynaptic and postsynaptic neurons?
Presynaptic neurons release the neurotransmitter in response to an action potential. Postsynaptic neurons receive the neurotransmitter (and can however become presynaptic to the next nerve cell, if the neurotransmitter has stimulated the cell enough).
What is the fucntion of a nerve cell?
the transport of nervous impulses ( also known as action potentials)
How do neurotransmitters initiate action potentials?
Neurotransmitters can help bring another neuron to the point where it initiates an action potential by binding to postsynaptic receptor sites. If the receptors are the type that allow positively charged ions to flux through the cell membrane, and if this happens on a large enough scale (i.e., multiple sites are hit at once), then the probability of an action potential occurring becomes very high.
What are the electrical events conducted along the cell plasma membrane that stimulate contraction?
Action potentials
Action potentials originate at the?
Action potentials are how nerve impulses are transmitted from neuron to neuron. An action potential is formed when a stimulus to the nerve cell causes the membrane to depolarize and open all of its sodium ion channels toward the threshold potential.
The effect of a neurotransmitter on the postsynaptic cell occurs when the neurotransmitter?
binds to specific receptors on postsynaptic cell membrane
What could ACh causes in the dendrites of the postsynaptic neuron?
It would initiate an "action potential," or in other words an electrical impulse carried from nerve to nerve. Neurotransmitters such as ACh (Acetylcholine) are like a medium of exchange between nerve cells, at the end of the neural fiber ACh is released, then picked up (smelled?) by the receptors at the end of another fiber, which can trigger such an impulse. And so these "action potentials" are passed rapidly from cell to cell.
