preganglionic sentence in Hindi
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- In particular, they are modified postganglionic cells of the autonomic nervous system that have lost their axons and dendrites, receiving innervation from corresponding preganglionic fibers.
- The sympathetic nervous system also has some preganglionic nerves terminating at the chromaffin cells in the adrenal medulla, which secrete epinephrine and norepinephrine into the bloodstream.
- Acetylcholine released by preganglionic sympathetic fibers of these nerves acts on nicotinic acetylcholine receptors, causing cell depolarization and an influx of calcium through voltage-gated calcium channels.
- Reelin may also ensure correct neuronal positioning in the spinal cord : according to one study, location and level of its expression affects the movement of sympathetic preganglionic neurons.
- The preganglionic fibers depart CN IX as the tympanic nerve and continue to the middle ear where they make up a tympanic plexus on the cochlear promontory of the mesotympanum.
- In the case of the gut, for example, the autonomic neurones do not form distinct ganglia, but rather the preganglionic neurons synapse within the Enteric nervous system.
- The adrenal medulla is considered a sympathetic ganglion and, like other sympathetic ganglia, is supplied by cholinergic preganglionic sympathetic fibers : acetylcholine is the neurotransmitter utilized at this synapse.
- Conversely, afferent input causes contraction of the sphincter through excitation of Onuf's nucleus, and contraction of the bladder neck and urethra through excitation of the sympathetic preganglionic neurons.
- Previously, it had been proposed to rename this group of non-preganglionic, neuropeptide-containing neurons to perioculomotor subgriseal neuronal stream, abbreviated " pIII SG ".
- It has been suggested that large doses ( ) of NmU inhibits the activity of the paraventricular nucleus of hypothalamus and / or the sympathetic preganglionic neurons, thus controlling the activity.
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