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The majority of parasympathetic fibers are found in the cranial nerves (specifically the oculomotor, facial, glossopharyngeal, and vagus nerves) and in the sacral spinal cord (S2-S4). These fibers innervate various organs such as the heart, lungs, and digestive system, promoting rest and digestion.
What else can I help you with?
Are parasympathetic postganglionic fibers generally come from adrenergic fibers?
No, parasympathetic postganglionic fibers do not come from adrenergic fibers. Parasympathetic postganglionic fibers release acetylcholine as their neurotransmitter, whereas adrenergic fibers release norepinephrine.
What parasympathetic ganglion sends postganglionic fibers to the sublingual and submandibular salivary glands?
The submandibular ganglion sends postganglionic fibers to the sublingual and submandibular salivary glands.
What nerve controls the sphincter pupillae?
The sphincter pupillae muscle is controlled by the parasympathetic fibers of the oculomotor nerve (cranial nerve III). Activation of these fibers causes constriction of the pupil (miosis).
Does the glossopharyngeal nerve include parasympathetic nerves?
Yes, except the CN X nerve, the CN IX, the CN VII, and the CN III nerve have the parasympathetic nerve
What is the structure represents the parasympathetic innervation fo the heart?
The parasympathetic innervation of the heart is primarily provided by the vagus nerve (cranial nerve X). The nucleus ambiguus in the medulla oblongata gives rise to the vagus nerve fibers that innervate the heart. These fibers slow down the heart rate by releasing acetylcholine at the SA node.
Are parasympathetic postganglionic fibers generally come from adrenergic fibers?
No, parasympathetic postganglionic fibers do not come from adrenergic fibers. Parasympathetic postganglionic fibers release acetylcholine as their neurotransmitter, whereas adrenergic fibers release norepinephrine.
Is mydriasis parasympathetic or sympathetic?
the parasympathetic fibers of the cranial nerve number three.
Are most innervated blood vessels receive only sympathetic nerve fibers?
No, most blood vessels are innervated by both sympathetic and parasympathetic nerve fibers. However, sympathetic nerve fibers typically have a more pronounced effect on blood vessel activity compared to parasympathetic fibers.
Postganglionic axons secrete acetylcholine cholinergic fibers?
Parasympathetic
Does the oculomotor nerve have motor fibers?
Yes it is motor and parasympathetic.
What cranial nerves does not contain preganglionic parasympathetic fibers?
optic (II)
A pelvic splanchnic nerve contains?
The pelvic splanchnic nerve contains parasympathetic fibers that regulate the function of pelvic organs, such as the bladder, rectum, and reproductive organs. These fibers are involved in controlling processes like urination, defecation, and sexual function.
How can sympathetic and parasympathetic fibers act as antagonists?
Sympathetic fibers convey impulses that stimulate our "fight or flight" response. Parasympathetic are just the opposite, you might say they are for "rest and digest". They are both firing at the same time but depending on your environment and emotional state, one will dominate over the other.
Which finger's nerves connect to the heart?
The heart is innervated by parasympathetic and sympathetic fibers.
Which nerves contain the most parasympathetic preganglionic fibers?
ciliary, pterygopalatine, otic, and submandibular.
What fibers carry information from the skin joints and skeletal muscles to the central nervous system?
parasympathetic
What parasympathetic ganglion sends postganglionic fibers to the sublingual and submandibular salivary glands?
The submandibular ganglion sends postganglionic fibers to the sublingual and submandibular salivary glands.
