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In parasympathetic reflex arc the preganglionic nerve fibre is longer than post ganglionic fibre, that is the synapse occur near the organ or tissue. While in sympathetic reflex arc both the pre and post have moderate sizes. The postganglionic fibre of parasympathetic always secrete acetylcholine as nuerotransmitter while postganglionic fibre of sympatheic reflex arc mostly secrete norepinephrine or epinephrine as nuerotransmitter. Some nerve fibres may secrete acetylcholine. For example postganglionic sympatehtic nerve fibres of sweat glands, pilorectal muscles and few blood vessels

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Q: Compare between sympathetic and parasympathetic in reflex arc?
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Related questions

What does the parasympathetic nervous system stimulate in the micturition reflex?

The parasympathetic nervous system allows the act of micturition. The sympathetic nervous system inhibits it.


What are the divisions of the ANS?

The division of the autonomic nervous system responsible for each of the reflexes is the ciliospinal reflex. Ciliospinal reflex responds mainly by the 2nd and 3rd order nerves to the muscle of the iris.


Where could a support group for those with reflex sympathetic dystrophy be found?

"To find a support group for those with reflex sympathetic dystrophy, you can try the Reflex Sympathetic Dystrophy Syndrome Association, where they can help you fully."


What best demonstrates an example of cooperation of the parasympathetic and sympathetic nervous systems?

The best example of cooperative autonomic effects is seen in controls of the external genitalia. Parasympathetic stimulation causes vasodilation of blood vessels in the external genitalia, and is responsible for erection of the male penis or female clitoris during sexual excitement. Sympathetic stimulation then causes the ejaculation of semen by the penis or reflex contractions of the vagina during an orgasm.


Is the ciliospinal reflex sympathetic?

yes


What parts of the body does reflex sympathetic dystrophy affect?

"Reflex Sympathetic Dystrophy usually affects the skin and blood vessles. However, it can easily affect any part of the body."


The pupillary light reflex is control by what autonomic nervous system?

pupillary light reflex is controlled by parasympathetic branch of Autonomous nervous system


What are the subsystems of the autonomic nervous system?

the nerve pathways followed by an impulse during a reflex.


What does the medical abbreviation RSD mean?

Reflex Sympathetic Dystrophy Syndrome


What division of the autonomic nervous system mediates the reflex release of saliva?

The parasympathetic nervous system stimulates salivary gland secretion, and accelerates peristalsis, so, in keeping with the rest and digest functions, appropriate PNS activity mediates digestion of food and indirectly, the absorption of nutrients. Source: Wikipedia: http://en.wikipedia.org/wiki/Autonomic_nervous_system enteric nervous system is responsible for the pupillary light reflex


When was reflex sympathetic dystrophy first noticed?

reflex sympathetic dystrophy (RSD) was noticed during the civil war in patients who suffered pain following gunshot wounds that affected the median nerve (a major nerve in the arm).


What receptors are stimulated in the micturition reflex?

Micturation is what we commonally call urination. There are various stretch activated receptors within the bladder and in the adjoining sphincter that participate in the reflex. The bladder has to disallow backflow and coordinate the contraction of the bladder with the relaxation of the terminal sphincter. This is done through both voluntary control of the musculature as well via sympathetic and parasympathetic reflexes.