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Why does sympathetic stimulation have less effect on blood vessels in the brain than on vessels in the skin?
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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.
In general Autonomic tone of peripheral blood vessels increase when?
sympathetic stimulation is increased.
Autonomic tone of peripheral blood vessels would be greatest when?
When sympathetic stimulation is increased.
What causes sympathetic division stimulation?
with stimulation of the sympathetic nervous system there will be a. constriction of the pupils b. dilation of the coronary arteries c. constriction of selected blood vessels d. profuse sweating
What does epinephrine do to the blood vessels?
Sympathetic stimulation (I'm guessing you mean your bodie's reaction in fight or flight) makes the blood vessles tighten, or constrict, hightening blood pressure. This is bad for you over long periods of time.
Sympathetic nervous system stimulation causes what?
with stimulation of the sympathetic nervous system there will be a. constriction of the pupils b. dilation of the coronary arteries c. constriction of selected blood vessels d. profuse sweating
Is Sympathetic tone defined as continuous stimulation of smooth muscles in the walls of blood vessels which results in partial constriction?
yes
What is the effect on blood pressure to an attack by a mugger?
Blood pressure would increase due to sympathetic nervous system stimulation.
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.
Are most blood vessels are innervated by the sympathetic division only?
no
What nervous system signals blood vessels to constrict?
The Sympathetic
Are most innervated blood vessels receive only sympathetic nerve fibers?
Most of the viscera get nerve supply from both sympathetic and parasympathetic systems.
