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What are the effectors that cause vasodilation and vasoconstriction?
Wiki User
∙ 12y ago
Muscles in the blood vessels are the effectors that cause Vasodilation and Vasiconstriction.
Wiki User
∙ 12y ago
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Does dehydration cause vasodilation?
I am not 100% sure if dehydration could cause vasodilation (swelling of a blood vessel), although it does make sense. As the temperature of the body rises, the blood vessels expand to release heat quicker. If one becomes dehydrated, and is then covered in ice packs, they may experience vasoconstriction, causing the blood vessels to constrict and hold heat in more, which would be unwanted.So if you were asking if dehydration causes dilation of the blood vessels, then yes.
The hypoxia associated with high altitude can cause?
vasoconstriction of the pulmonary blood vessels
What are the two types of effectors and how does each respond to stimuli?
There are two main types of effectors namely homotropic and heterotropic effectors. Homotropic effectors substrate themselves while the heterotropic effectors produce enzymes to help in various processes in the body.
Effectors of a reflex arc are glands and what?
effectors can only be glands or muscles
Describe how the arterioles in the dermis respond to heat cold and stress?
Arterioles dilate in warm environments (vasodilation). Dilate means to open. Vasodilation is a process in which the increased blood flow through the dermis brings excess heat close to the body surface to be radiated to the environment. Arterioles constrict in cold environments (vasoconstriction). Constrict means to close. Vasoconstriciton is a process in which the decreased blood flow through the dermis keeps heat within the core of the body. Both take place to maintain homeostasis. In stressful situations, vasoconstriction takes place. It will shunt in the dermis or redirect blood to more vital organs such as the muscles, heart and brain.
Where in the body would you find low oxygen levels causing vasoconstriction and high levels causing vasodilation?
Low oxygen levels cause vasodilation in systemic arterioles.High oxygen levels cause vasodilation in capillaries in the lungs.
Differences between vasodilation and vasoconstriction?
Vasodilation is relaxation of blood vessels leading to increase in lumen size. Vasoconstriction is contraction of blood vessels leading to decrease in lumen size.
What is the importance of negative feedback in the control of vasodilation and vasoconstriction?
Vasoconstriction and Vasodilation are a part of a body negative feedback, in which the body tries to restore homeostasis. Homeostatis is the function of keeping the internal body at it's general temperature (37 degrees Celsius). Without the negative feedback of Vasoconstriction and Vasodilation, the body would either be at a very low or very high temperature and this high/low temperature could cause death.
What does vasoconstriction and vasodilation mean?
Vasoconstriction means the constriction of blood vessels.Vasodilation means there is more banter swag in the penis
Do veins have the ability to go through vasoconstriction and vasodilation?
Yes, the veins have the ability to go through the vasoconstriction and vasodilation. This also applies to the other elastic tubular channels like the capillary and the arteries.
When is vasodilation bad?
Never. Unless you're bleeding, but if you're bleeding the body will undergo vasoconstriction not vasodilation so the answer is never.
Does the sympathetic nervous system cause vasoconstriction?
Yep! The sympathetic nervous system causes both vasoconstriction & vasodilation. During "fight or flight" you need more O2/blood delivered to your skeletal muscles. The SNS causes vasodilation in skeletal muscles. The other organs, of the body (like digestive organs) are not needed for "fight or flight" survival. The SNS causes vasoconstriction in these organs.
How do sympathomimetics relieve nasal congestion associated with colds and allergies?
they cause vasoconstriction 2. they cause vasodilation 3. they stimulate deeper breathing 4. they relax muscles in the air passages
Why does vasodilation and vasoconstriction happen in a cycle?
Vasodilation and vasoconstriction occur in a cycle to regulate blood flow and maintain homeostasis in the body. Vasodilation refers to the widening of blood vessels, which allows for increased blood flow and delivery of oxygen and nutrients to tissues. Vasoconstriction, on the other hand, is the narrowing of blood vessels, which reduces blood flow and conserves heat and nutrients. These processes are dynamically regulated based on various factors such as tissue oxygen levels, metabolic demands, and body temperature.
In what body part would you find low oxygen levels causing vasoconstriction and high levels causing vasodilation?
LUNGS
What produces vasoconstriction?
Peripheral vasoconstriction is the tightening of the blood vessels, particularly the arteries. It is caused by smoking, drinking alcohol and coffee, as well as the intake of medicine such as antihistamine.
Does vasoconstriction conserve heat?
Yes, Vasoconstriction is the constricting (narrowing) of the arterioles supplying the the blood to capillaries close the skin surface. Heat is lost from the blood that does pass close to the surface (via radiation).Vasocontriction however, allows much of the blood to pass below the fatty adipose tissue rather than close to the surface.Vasodilation is the dilation (enlargening) of the arteriole that supplies blood to the capillaries. Therefore less blood flows beneath the adipose tissue, and much more flows close the skins surface. Much more heat is lost via radiation this way.Vasoconstriction is co-ordinated via the sympathetic nervous system (stimulates effectors like the smooth muscle)Vasodilation is co-ordinated via the parasympathetic nervous system (inhibits effectors like the smooth muscle)
