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Which structure is innervated only by the sympathetic division of the ANS?
Wiki User
∙ 11y ago
Many blood vessels, sweat glands in the trunk, arrector pili in the skin, adrenal medulla
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoFalse
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Are most innervated blood vessels receive only sympathetic nerve fibers?
Most of the viscera get nerve supply from both sympathetic and parasympathetic systems.
The pineal gland and the adrenal medulla functionally related?
The only thing I can think of that causes a relation between the two is that they are both innervated by post-ganglionic sympathetic nerves and interpret the signals received from these nerves into hormonal signals.
What tissues are innervated?
Most tissues have a nerve supply. There only one that is not and that is the brain itself.
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.
Which neuro transmitter released from ganglionic of the parasympathetic division?
Nor-adrenaline is secreted at post ganglionic sympathetic synapses. There is re-uptake of Nor-adrenaline by nerve ending and only partially destroyed there by the enzyme C.O.M.T. There is no enzyme like acetylcholinesterase present there as in post ganglionic parasympathetic synapse to destroy the acetylcholine.
Are most blood vessels are innervated by the sympathetic division only?
no
What target tissues are innervated by only neurons from the sympathetic nervous system?
adrenal medulla
Are most innervated blood vessels receive only sympathetic nerve fibers?
Most of the viscera get nerve supply from both sympathetic and parasympathetic systems.
What innervates the heart?
The heart is innervated by vagal and sympathetic fibers. The right vagus nerve primarily innervates the SA node, whereas the left vagus innervates the AV node; however, there can be significant overlap in the anatomical distribution. Atrial muscle is also innervated by vagal efferents, whereas the ventricular myocardium is only sparsely innervated by vagal efferents. Sympathetic efferent nerves are present throughout the atria (especially in the SA node) and ventricles, including the conduction system of the heart.
The pineal gland and the adrenal medulla functionally related?
The only thing I can think of that causes a relation between the two is that they are both innervated by post-ganglionic sympathetic nerves and interpret the signals received from these nerves into hormonal signals.
What 3 structures are only innervated by the sympathetic nervous system?
-The skin(sweat glands and arrectopili muscles attached to the hair follicles) -the adrenal medulla - and all blood vessels(except of the external genitalia)
What tissues are innervated?
Most tissues have a nerve supply. There only one that is not and that is the brain itself.
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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.
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Yes. microtubules are part of the cytoskeleton and help separate the DNA during metaphase and anaphase of mitosis. But generally, cytoskeleton is only for cell structure.
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Only with respiratory, the digestive system stops at the larynx (the beginning of the trachea). Also it is innervated by the cardiovascular and nervous systems
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