Ad
related to: vasoconstriction and vasodilationwexnermedical.osu.edu has been visited by 10K+ users in the past month
262 Neil Avenue # 430, Columbus, Ohio · Directions · (614) 221-7464
- Prepare For Your Visit
What to bring to your visit
plus heart & vascular resources
- Should I see a Heart Doc
Talk to your doc about your heart
and learn what to ask
- Find a Doctor
Meet with our experts to diagnose
your symptoms and receive treatment
- Patient Testimonials
Hear from our patients
about their Ohio State experience
- Prepare For Your Visit
Search results
Results from the WOW.Com Content Network
Vasoconstriction is the narrowing of the blood vessels resulting from contraction of the muscular wall of the vessels, in particular the large arteries and small arterioles. The process is the opposite of vasodilation , the widening of blood vessels.
Vasodilation is the opposite of vasoconstriction, which is the narrowing of blood vessels. When blood vessels dilate , the flow of blood is increased due to a decrease in vascular resistance and increase in cardiac output [ further explanation needed ] .
Like vasoconstriction, vasodilation can be caused by internal and external factors. For example, nitric oxide, found in food, is a very potent vasodilator. It has been found that nerves in the spinal column can trigger both processes. Vasodilation is also triggered for thermoregulation to provide heat dissipation.
Vasoconstriction (i.e., decrease in the diameter of arteries and arterioles) increases resistance, whereas vasodilation (increase in diameter) decreases resistance. Blood flow and cardiac output are related to blood pressure and inversely related to vascular resistance.
The hunting reaction or hunting response is a process of alternating vasoconstriction and vasodilation in extremities exposed to cold. The term Lewis reaction is used too, named after Thomas Lewis, who first described the effect in 1930. [1] Vasoconstriction occurs first to reduce heat loss, but also results in strong cooling of the extremities.
Both of these factors affect pH and, in turn, the balance between vasodilation versus vasoconstriction in the brain. [3] [4] So, the blood vessels found specifically in the brain respond changes in dissolved carbon dioxide levels. Coronary (heart) circulation is controlled at the local level primarily by metabolic control mechanism. More ...
Agonists of alpha-2 receptors in the vascular smooth muscle lead to vasoconstriction. However, in clinical practice drugs applied intravenously that are agonists of alpha-2 receptors such as clonidine lead to powerful vasodilation, which causes a decrease in blood pressure by presynaptic activation of the receptors in the sympathetic ganglia ...
The vascular nerves control vasodilation and vasoconstriction, which in turn lead to the control and regulation of temperature and homeostasis. Vasodilator innervation is restricted to the following sites : 1.) The vessels of the skeletal muscle are dilated by cholinergic sympathetic nerves 2.)
Ad
related to: vasoconstriction and vasodilationwexnermedical.osu.edu has been visited by 10K+ users in the past month
262 Neil Avenue # 430, Columbus, Ohio · Directions · (614) 221-7464