Dopamine
cytoplam
True. Cocaine causes the sudden release in the brain of a neurotransmitter called dopamine. Source. Prentice Hall
Calcium triggers synaptic vesicles to discharge the neurotransmitter into the synaptic cleft.
specific cardiac and smooth muscle fibers
An example of a drug that blocks release of a neurotransmitter is botulinum toxin (Ach) and atropine.
An example of a drug that blocks release of a neurotransmitter is botulinum toxin (Ach) and atropine.
acetycholine
acetylcholine (ACh)
cytoplam
True. Cocaine causes the sudden release in the brain of a neurotransmitter called dopamine. Source. Prentice Hall
It is important for the neurotransmitter to be deactivated soon after its release so that actional potential generation can be stopped when the organism doesn't need it any more.
The Joy of Natural Childbirth - 1985 was released on: USA: 1985
Ca2+
Calcium triggers synaptic vesicles to discharge the neurotransmitter into the synaptic cleft.
No, calcium itself is not a neurotransmitter BUT it is highly important in the process of the action potential. The action potential triggers the influx of calcium at the end of the terminal bouton, causing the influx of Ca2+ into the cell and this triggers for the release of the neurotransmitter. :)
There is no neurotransmitter release from the axon terminal when there are no calcium ions in the extracellular solution. This is because the exocytosis of the synaptic vesicles is calcium dependent.
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).