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Vaso meaning blood vessels and constriction meaning narrowing. Vasoconstriction is when your blood vessels become smaller or more narrow. This applies to arteries, veins, etc. A common vasoconstricter is Visine, because it constricts the blood vessels in the eye which is why your sclera turns from red to white.
Wiki User
∙ 15y ago
Wiki User
∙ 14y agoIs the narrowing of the blood vessels resulting from contraction of the muscular wall of the vessels.
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Where in the body would you find low oxygen levels causing vasocontriction and high levels causing vasodilation?
lungs
How do Arctic foxes behave?
Actually, they behave surprisingly similar to your regular foxes. However, you tend to find that they have an extensive baroreceptor reflex to mediate vasocontriction. This is because it is cold in the arctic and shivering due to vasocontriction helps keep them warm. Also, their paws are larger with longer claws to make it easier to walk on ice.
Does vascular spasm impair coagulation?
Actually, vasocontriction enhances coagulation because the fibrin molecules and platelets have more time to sit in one spot and form a blood clot.
What function does the human skin have in temperature regulation?
1. sweat gland: the evaporation of the sweat from the surface of the skin maintains a constant body temperature. 2. blood capillaries: vasodailation or vasocontriction is also responsible for the temperature regulation.
How does vasocontriction reduce heat loss?
Your blood vessels will constrict, which means that your blood will flow closer to the centre of your body and nearer to your heart which will keep you warmer. In the opposite case, vasodilation, your blood vessels dilate, causing blood to flow closer to your skin, where the heat energy will radiate out of your body. This will also cause your cheeks to go pink :).
What are the biological advantages of the fight or flight response In regards to 1 Vasocontriction of blood vessels entering and leaving the heart 2 Stimulate conversion of glycogen to glucose?
When talking about the right or flight response in regards to the the vasoconstriction of blood vessels entering and leaving the heart, the biological advantage is having your heart ready and your muscles ready for anything. As for the conversion of glycogen to glucose, this is referring to the energy your body uses.
What logical reason explains why the sympathetic nervous system slows down blood flow to the digestive system?
Vasocontriction throughout the intestinal tract during sympathetic discharge helps redistribute the blood and makes it easier for the heart to maintain higher diastolic blood pressure. This increases blood flow to major muscle groups and in turn permits increased oxygenation and energy utilisation, both of which are necessary during situations where physical exertion may have a (perceived) survival benefit.
Conditions causing high systole and low diastole?
If your blood vessels dilate whithout an increase in your heart rate, your blood pressure can drop dramatically. exercise stimulates your heart rate to increase and also hormones such as Nitros oxide (NO aka. Viagra) causes vasocontriction or the contracting of blood vessels so that blood pressure rises.
Does liver maintains body temperature?
yes the liver does maintain body temperature. 1. the liver produces acute phase proteins in response to cytokines which are as a result of inflammatory or infection or other insults to the body..these acute phase proteins act on the hypothalamus and it changes the set point..in response to the change in set point, it stimulates the release prostaglandins which will cause vasocontriction and increase core temperature and if the temperature is above the norm, there is decreased prostaglandins released and vasodilation in turn and increased heat loss. 2. the liver is a great store of and because there are many metabolic activities in the liver, these activities produce heat which is transfered to the blood and as in moves in and out of the liver the blood picks up the heat to distribute it to the body and thus maintaining body temperature.
What does the drug atenolol do?
Not quite sure. but from reading the MSDS material safety data sheet http://64.233.169.104/search?q=cache:vuPEdjno1UoJ:www.sciencelab.com/xMSDS-Atenolol-9922980+msds+Atenolol&hl=en&ct=clnk&CD=1&gl=us I can tell you this do not INGEST it. --------------------- Atenolol (AKA Tenormin) is a beta-blocker and commonly used as a anti-hypertensive medication. Beta-blockers act against the beta andrenergic site of cardiac and smooth muscle (specifically the lungs). It essentially slows down heart rate and vasodialates the lungs, which helps to lower blood pressure. It's most common form is pills, so yes you will need to ingest it.
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)
Why does your face turn red after coming out of cold?
When we are cold: the body keeps the heat vasoconstriction, the extremities are the first to respond (feet, hands, ears primarily through a system of glomerules neuro-vascular ..), for a long time, the center of thermal-regulation detects a drop of temperature and bad blood irrigation where vasocontriction had place; even tone muscles constricting may exhausted ... so it test -the center of thermal-regulation- to regulate the deficit by the fact that is a reverse: vasodilatation (even exaggerated) giving the red color and a loss of heat (red and hot ear), and this happens especially if the rest of the body is heated (or reheated) or if it comes into hot environment (both cases exacerbate thermolysis by the same mechanism). So everything is physiological and nothing to fear; it returns to normal over time, and it should not persist for several hours unless if someone is overheated or in rare and exceptional cases. If vasodilatation is deeper, it can occur in the intra-cranial blood vessels causing pain tete or trigger other problems like migraine ... And there are many others sure several things to say.
