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a neuron
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∙ 12y ago
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Where do synaptic vesicles discharge their contents by exocytosis?
in the presynaptic membrane :)
What sequence of events occurs when an action potential arrives at the presynaptic terminal?
calcium ions to diffuse into the cell.
What is an autoreceptor?
An autoreceptor is a receptor which is situated in the terminal of a presynaptic nerve cell, sensitive to neurotransmitters released by the neuron in whose membrane the autoreceptor sits.
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.
Are neurotransmitter expelled from the presynaptic cells?
yes
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).
Where do synaptic vesicles discharge their contents by exocytosis?
in the presynaptic membrane :)
What sequence of events occurs when an action potential arrives at the presynaptic terminal?
calcium ions to diffuse into the cell.
What is rueptake?
The process by which a presynaptic nerve cell takes neurotransmitter out of the synapse and recycles it to prevent too much signaling.
What are characteristics of neurotransmitters?
Neurotransmitters are released in response to stimulation. They alter the physiology of the postsynaptic cell. They are synthesized by a presynaptic neuron. They bind to specific receptors on the postsynaptic cell.
What is an autoreceptor?
An autoreceptor is a receptor which is situated in the terminal of a presynaptic nerve cell, sensitive to neurotransmitters released by the neuron in whose membrane the autoreceptor sits.
Which neural circuit enables a single presynaptic stimulation to cause a postsynaptic cell to send a series of impulses?
Diverging Circuit
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.
What is The process by which the neurotransmitter substance leaves the presynaptic terminal button is called?
Leaves the presynaptic neuron, activates ion channel
Presynaptic inhibition is the opposite of?
Facilitation
EPSPs produced by many different presynaptic fibers converging on a single postsynaptic neuron causing summation on the postsynaptic dendrites and cell body best describes?
spatial summation
Are neurotransmitter expelled from the presynaptic cells?
yes
