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Does the effect of epinephrine mimic the effect of the sympathetic nervous system or the parasympathetic nervous system?
Wiki User
∙ 13y ago
epinephrine (or adrenaline in the UK) mimics the effects of norepinephrine (noradrenaline in UK), so activates the SNS, not the PSNS.
Wiki User
∙ 13y ago
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Does coronary vessels have both parasympathetic and sympathetic innervation?
Yes. Sympathetic nerve stimulation dilates the blood vessels. Parasympathetic nerve stimulation constricts the blood vessels. The sympathetic nerve stimulation effect is more pronounced.
How does the somatic nervous system differ from the autonomic nervous system?
The somatic nervous system controls the voluntary movement of skeletal muscles, such as when you move your arm. The autonomic nervous systems controls the involuntary actions of internal organs and glands. The beating of your heart is controlled by this system. The autonomic nervous system is further broken up into two parts: the sympathetic, which controls arousal (think fight-or-flight), and the parasympathetic, which controls calming (think rest and digest).
In what way do the parasympathetic and the sympatheticnervous systems work together?
Yes. The vagus nerve is a parasympathetic nerve that is almost always stimulating the healthy heart to have a heart rate less than the inherent rate of the SA node. The sympathetic innervation on the heart is minimal and only important during exercise.
How does the sympathetic nervous system work in stress?
The sympathetic nervous system is the part of the autonomic nervous system originating in the thoracic and lumbar regions of the spinal cord that in general inhibits or opposes the physiological effects of the parasympathetic nervous system, as in tending to reduce digestive secretions, speeding up the heart, and contracting blood vessels.
Would The parasympathetic nervous system control and allow for active diuresis?
Parasympathetic stimulation stimulates the muscarinic receptors (and nicotinic) leading to increased Salivation, Lacrimation, Urination, Defacation, increased Gastric motility, Emesis etc Baroreceptors detect increased BP (vessel stretch) and increase vagal tone - > increase parasympathetic tone ->increase muscarinic stimualtion - > diuresis Also consider the effect of Atrial Natruetic Peptide and its effect...
Why sympathetic nervous system has generalized effect while parasympathetic nervous system has localized effect?
the ratio of a preganglionic neuron to
What is the parasympathetic and Sympathetic effect on the stomach?
The parasympathetic is stimulatory to stomach , increase the gastric secretion and motility while the sympathetic is inhibitory , decrease the gastric secretion and motility
What is the sympathetic effect on the heart?
Heart rate increases with sympathetic nervous system. There is increase in stroke volume and cardiac output. With stimulation of vagus nerve or parasympathetic nervous system, You have decrease in heart rate. There is decrease the stroke volume and cardiac output.
Does coronary vessels have both parasympathetic and sympathetic innervation?
Yes. Sympathetic nerve stimulation dilates the blood vessels. Parasympathetic nerve stimulation constricts the blood vessels. The sympathetic nerve stimulation effect is more pronounced.
Explain the difference between sympathetic and parasympathetic reactions as they occur in the autonomic nervous system?
The sympathetic nervous system is most active when you are in an emergency, exercising, or an exciting or embarrassing situation. It is often referred to as the "fight-or-flight" system. It increases the heart rate, blood pressure, and blood glucose levels. It also dilates the bronchioles of the lungs, and dilates the blood vessels of the skeletal muscles. This nervous system enables the body to cope rapidly with situations. The parasympathetic nervous system is active when the body is resting. It is referred to as the "resting-and-digesting" system. It conserves your body's energy by slowing the heart rate. It also promotes digestion.sypmathetic is the "fight or flight" response and the parasympathetic is the "rest and digest" responses
What effect would a drug that blocks the parasympathetic nervous system have on peristalsis in the GIT?
increase motility
What has the author Naeema C Degani written?
Naeema C. Degani has written: 'Effect of ethanol on the sympathetic nervous system' -- subject(s): Physiological effect, Sympathetic nervous system, Alcohol, Alcohol in the body
Why are sympathetic responses generally widespread?
Sympathetic responses are more widespread because of the way the efferent nerves (from spinal cord outward) are positioned. The autonomic system has two neurons between its spinal cord and the organ that it is modulating whereas the somatic system has only one. The difference between the sympathetic and the parasympathetic is that in the case of sympathetic, the first nerve out of the spinal cord, called the preganglionic fiber is extremely short and ends relatively close to the spinal cord. Here, the preganglionic fiber synapses with on average of 10 postganglionic fibers which then moves onto effect a variety of different organs. On the other hand, in the parasympathetic division the preganglionic nerve are extremely long and extends until it is almost at the organ. From there, it synapses with a very short post-synaptic nerve that then synapses an organ. The ratio in this case can be about 1:3 but usually is 1:1. To sum things up, in the sympathetic division, the preganglionic fiber terminates very early and therefore has the "opportunity" to interact with a variety of nerves. On the other hand, the parasympathetic division has such a long preganglionic fiber that by the time it synapses its post ganglionic fiber, it is pretty much at the organ. NE and epinephrine are secreted into the blood as part of the sympathetic response.
Is increased cognitive functioning an antagonistic effect of the sympathetic nervous system?
no, increased cognitive functioning is not
Why the symptoms of hyperthyroidism may be confused with a disorder of the autonomic nervous system?
Hyperthyroidism may be confused with a disorder fo the autonomic nervous system primarily because of the the permissiveness (biology) of the thyroid hormones on the hormones and neurotransmitters (epinephrine and norepinephrine) of the sympathetic division of the autonomic nervous system. Thyroid hormones exacerbate the effect of the sympathetic nervous system, causing "speeding up" of various body systems and symptoms resembling an overdose of epinephrine (adrenaline). These include fast heart beat and symptoms of palpitations, nervous system tremor such as of the hands and anxiety symptoms, digestive system hypermotility (diarrhea), considerable weight loss and unusually low lipid panel (cholesterol) levels as indicated by a blood test.
How does the somatic nervous system differ from the autonomic nervous system?
The somatic nervous system controls the voluntary movement of skeletal muscles, such as when you move your arm. The autonomic nervous systems controls the involuntary actions of internal organs and glands. The beating of your heart is controlled by this system. The autonomic nervous system is further broken up into two parts: the sympathetic, which controls arousal (think fight-or-flight), and the parasympathetic, which controls calming (think rest and digest).
What effect does the sympathetic and parasympathetic nervous system have on the digestive system?
The parasympathetic nervous system is a division of the autonomic nervous system (along with the sympathetic nervous system, and the enteric nervous system). In simple terms, the SNS can be thought of as the body's gas pedal, and the PNS as the brake. So where the SNS deals with 'fight or flight' the PNS deals with 'rest and digest'. In other words, the PNS is often inhibitory. For example, it can act to slow down heart rate, enhance the peristaltic contractions of the gut, or increase secretions of digestive enzymes. In can also cause vasodilation (make the blood vessels wider) around your gut after meals: this means more blood flows to your intestive and stomach after you've eaten a meal, allowing you to digest what you've eaten.
