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Which division of the nervous system has short preganglionic neurons?
sympathetic
Which division of the autonomic nervous system is characterized by short preganglionic and long postganglionic fibers?
The parasympathetic nervous system has long preganglionic and short postganglionic fibers
Responsibility of the autonomic nervous system?
All the unvoluntary things.... You have the parasympathetic nervous and the sympathetic nervous system. Parasympathetic nervous system: Long pre-g, short post-g aka the craniosacral nervous system - The slow responses.... like slow heart rate by vagus nerve Sympathetic nervous system: Short preg-, long post-g aka the thoracolumbar nervous system - Fight or flight responses like increase heart rate . Pre-g nicotinic stimulation to adrenal medulla which releases adrenaline (epinephrine)
Is short preganglionic axons parasympathetic or sympathetic?
Short preganglionic axons are characteristic of the sympathetic nervous system. In the sympathetic division, these axons originate in the spinal cord and project to nearby ganglia, which are typically located close to the spinal cord. In contrast, the parasympathetic nervous system features long preganglionic axons that extend from the brainstem or sacral spinal cord to ganglia located near or within target organs.
What system regulates the body's functions rapidly but the effects are short lived?
The endocrine system regulates the body's functions rapidly through the release of hormones into the bloodstream, but the effects are short-lived compared to the nervous system. Hormones act on target organs to elicit specific responses and are quickly broken down or removed from circulation.
Is the sympathetic nervous system same as central nervous system?
Autonomic nervous system is that part of the nervous system that controls the body function that are not consciously controlled by the human brain like breathing, heartbeat, and digestive processes. Autonomic nervous system is a part of the peripheral nervous system. It works along with the somatic nervous system to regulate the body functions.
How do the sympathetic and parasympathetic nervous systems operate antagonistically in emotional responses?
One system creates an emotional response, and the other dampens it. The sympathetic nervous system creates a short-term mobilizing response, and the parasympathetic nervous system dampens it in the long term.
How does the sympathetic nervous system contribute to manintaining homeostasis?
In short, stimulation of the sympathetic branch of the autonomic nervous system prepares the body for emergencies: for "fight or flight". This system allows for these reactions to occur with out upsetting the balance of the human body. It increases activity that is necessary to the "fight or flight" response(ex: blood pressure, heart rate, and adrenaline) and decreases activity that is unnecessary (ex: salivation and digestion)
What is the difference in the origins of the nerves in the sympathetic and parasympathetic system?
There is no difference in the origins of the nerves in the sympathetic and parasympathetic nervous system. The differences come from the lengths and the neurotransmitter released. The parasympathetic nervous system is a two nerve system. The first nerve is long and releases acetyl choline. The second nerve is short and also releases acetyl choline. The sympathetic nervous system is also two nerves, the first being short and releasing acetyl choline. The second is long and releases norepinephrine. Hope this helped!
What part of the PNS controls the pupillary response?
Pupillary response is controlled by the autonomic nervous system.In bright light or when looking at close objects, the parasympathetic nervous system will cause pupillary constriction by activating the sphincter pupillae muscle(s). The parasympathetic nerves that innervate the sphincter pupillae are the short ciliary nerves, which come from the ciliary ganglion in the orbit. Innervation of the ciliary ganglion is via parasympathetic pre-ganglionic fibers traveling with the occulomoter nerve from the edinger-westfall nucleus in the cranial midbrain.In low light, when looking at distant objects, or when stress levels are high (fight or flight) the sympathetic nervous system will cause pupillary dilation by activating the iris dilator muscle(s). The sympathetic nerves that innervate these muscles come from the superior cervical ganglion.
What is a short-term effect of alcohol on the nervous system?
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What is a short term effect of alcohol on the nervous system?
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