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| acetylcholine |
in biochemistry, the substance produced during nerve conduction that transmits nerve impulses across synapses and causes muscles to move. [1/2 definitions] |
| cholinesterase |
an enzyme found in the heart, brain, and blood that hydrolyzes acetylcholine to acetic acid and choline, to block the transmission of nerve impulses. |
| effector |
a cell or an organ such as a muscle or gland that responds to a nerve impulse. |
| ganglion |
any concentrated mass of nerve cells outside the brain or spine, serving as the source of nerve impulses. [1/2 definitions] |
| neurotransmitter |
a biochemical substance, such as epinephrine, that transmits or inhibits nerve impulses across the synapse of one cell to the synapse of another. |
| olfactory nerve |
either of the first pair of cranial nerves that transmit nerve impulses from the mucous membrane in the nose to the forebrain. |
| reuptake |
in physiology, the reabsorption of a neurotransmitter by a neuron following transmission of a nerve impulse. |
| synapse |
the point where nerve impulses are transmitted between the axon of one neuron and a dendrite or the cell body of another neuron. |
| vasoconstriction |
constriction or narrowing of a blood vessel or vessels, as in response to a nerve impulse. |
| vasodilation |
dilation or widening of a blood vessel or vessels, as in response to a nerve impulse. |
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