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Answered 2011-09-18 04:14:31

Arteries and blood vessels.

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How is blood pressure affected when you increase dilation?

Blood pressure drops as dilation increases. This occurs because of decrease resistance.

What is vasomotor instability?

Relating to, causing, or regulating constriction or dilation of blood vessels. Source:

What does arterial blood pressure depend on?

Your arterial blood pressure (BP from here) depends on the volume pumped by the heart and the constriction of the arterial walls. To a degree, it's also affected by things like gravity, pose and blood volume.

What promotes constriction of blood vessels resulting in elevation of blood pressure?


What is vasoconstriction?

Vasoconstriction is the constriction or narrowing of blood vessels by small muscles in their walls, slowing or blocking blood flow. Vasoconstriction is the constriction of blood vessels that increases blood pressure.

What effect does serotonin have on blood vessels?

Serotonin has an constrictive effect on the blood vessels in the brain. It's role in the rest of the body can cause both dilation or constriction.

What does Sympathetic division stimulation causes?

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

Does caffeine thin the blood?

Caffeine can cause high blood pressure and vein constriction. It is not said to be a blood thinner, though.

Are smooth muscles involentary muscles?

Yes, smooth muscle is involuntary muscle, meaning it will cause actions that you don't have to think about. For example, your vasculature is surrounded by smooth muscle to allow dilation or constriction of blood vessels to help control blood pressure and shunt blood away from or to certain regions of the body.

Why is blood pressure higher lying down than sitting or standing?

In most cases, body position has very little effect on blood pressure. In many cases, the blood pressure will rise a little as a result of the heart rate going up when sitting or standing compared to lying down. Some people have an imbalance in their Autonomic Nervous System, which controls constriction and dilation of blood vessels and may find that their blood pressure is lower when standing as opposed to when lying down or sitting.

Is smoking bad for high blood?

Smoking can cause hardening and constriction of the arteries so it is bad if you have high blood pressure.

What is Blood flow through the circulatory system affected by?

Blood flow can be affected by such factors as clots and blood pressure which are in turn affected by obesity and genetics.

Is blood pressure affected by Vegemite?


How does blood pressure promote filtration of blood in the kidneys?

Blood pressure promotes filtration of blood in the kidneys by, generally, being greater in pressure than blood colloid osmotic pressure and glomerular capsule pressure which produces a net filtration pressure of about 10 mm Hg. Net filtration pressure forces a large volume of fluid into the capsular space. When blood pressure increase or decreases slightly, changes in the diameters of the afferent and efferent arterioles can actually keep net filtration pressure steady to maintain normal glomerular filtration. Constriction of the afferent arteriole decreases blood flow into the glomerulus, which decreases net filtration pressure. Constriction of the efferent arteriole slows outflow of blood and increases net filtration pressure.

What is the correct spelling for spigmometer?

A "sphygmomanometer" is an instrument that measures blood pressure, usually by using a constricting inflatable collar on the arm. The blood presses out against the constriction and can be compared to the air pressure inside the sleeve.

How is blood pressure affected by exercise?

Blood pressure is increased to surply the oxygenated blood to cells that are metabolising and carrying the deoxygenated to the lungs to be oxygenated.

How can an ACE help mediate her blood pressure?

An ACE inhibitor (or angiotensin-converting-enzyme inhibitor) is a pharmaceutical drug used primarily for the treatment of elevated blood pressure. This group of drugs causes dilation of blood vessels, which results in lower blood pressure. ACE inhibitors decrease the tension of blood vessels and blood volume, thus lowering blood pressure.

How can an ACE help mediate her blood pressure-?

An ACE inhibitor (or angiotensin-converting-enzyme inhibitor) is a pharmaceutical drug used primarily for the treatment of elevated blood pressure. This group of drugs causes dilation of blood vessels, which results in lower blood pressure. ACE inhibitors decrease the tension of blood vessels and blood volume, thus lowering blood pressure.

Which action below is affected by an antihistamine a. blood vessel dilation b. phatocytosis of antigens c. MHC presentation by macrophages d. the secondary immune response e. colonal selection of ant?

A. Blood Vessel Dilation

When there is increased resistance then arteriolar constriction and pressure drops?

Resistance changes dramatically with changes in diameter of blood vessels (arterioles are one type of blood vessel). If you INCREASE the diameter of the arteriole, you DECREASE the resistance and thus DECREASE the blood pressure.

What is the role of blood vessel when blood circulates?

Answer:The Role of Blood Vessels when Blood Circulates is Simple; they are the part of the Circulatory System that transports blood throughout the body. Explanation:There are 3 types of Blood Vessels: Arteries: Carry the blood AWAY from the heart.Capillaries: Allow for the Exchange of Chemicals & Water, like Oxygen in the lungs with Blood, and also between the Blood and Body's Tissues.Veins: Carry blood TOWARD the heart.Blood Vessels (Arteries and Veins) can change their diameter by muscular Contraction & Dilation, thereby changing the pressure which in turn changes the blood flow to organs which are 'downstream.' The Dilation and Constriction of Blood Vessels is regulated/determined by the Autonomic Nervous System (an example of this is when you Stand - the Blood Vessels in your legs Constrict, increasing the pressure in those Blood Vessels, to keep the average blood flow/pressure consistent). Another Function of Blood Vessels' ability to Constrict and Dilate is also a means for the body to regulate its temperature.

What is involved in the regulation of blood pressure?

Heart rate, the constriction of the arterial walls (reducing/increasing the volume of the circulatory system) and the blood volume in the circulatory system. If you wish to increase or decrease blood pressure, you can do this through adjusting any of the above and more.

How are The kidneys affected by blood pressure?

I can tell you that high blood pressure, if it is not brought under control, can cause the kidneys to fail completely.

What keeps blood from pooling in the legs?

the constriction of the blood vessels

What is the effector for blood vessel constriction?

Damage to the blood vessel.

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