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The Arterioles, which are smaller branches of the Arteries need to expand and contract.
Reason being, the Arterioles are what control / regulate our blood pressure.
When blood enters the Arterioles from the Arteries, they either contract or expand, which alters the amount and resistance of blood flow through them.
If they remain contracted for any reason, this will make the heart pump harder due to the resistance, which will result in Hypertension, or high blood pressure.
The arterioles, which are made up of smooth muscle, also carry blood to your capillaries, where the exchange of gases (O2 & CO2) takes place.
O2 = Oxygen which we breathe in
CO2 = Carbon Dioxide which we exhale
Wiki User
∙ 15y ago
Wiki User
∙ 14y agoYes, the process is called vasodilation. It increases blood flow to that particular tissue, allowing it to perform energy-consuming tasks.
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High osmolarity or high Na plus and Cl- in the ascending loop of Henle will cause afferent arterioles to dilate or constrict by releasing?
Constrict by releasing a vasoconstrictor chemical, usually ATP
Can fear cause pupils to constrict?
It causes them to dilate not constrict.
What structure shunts blood from the arteriole to the venule?
The structure of an arteriole is:Arterioles are tiny branches of arteries that lead to capillaries.These are also under the control of the sympathetic nervous system, and constrict and dialate, to regulate blood flow.
In which part of the circulatory system does the greatest pressure drop occur?
The greatest pressure drop in the circulatory system occurs in the arterioles. Arterioles are small, muscular blood vessels that regulate blood flow and control blood pressure. As blood travels from the arteries to the capillaries, the arterioles cause a significant decrease in pressure to ensure proper exchange of nutrients and waste between the blood and tissues.
What does vasodilation in the skin and viscera result from?
relaxation of smooth muscle in the arterioles
How do arterioles in the dermis respond to a cold environment?
Constrict
High osmolarity or high Na plus and Cl- in the ascending loop of Henle will cause afferent arterioles to dilate or constrict by releasing?
Constrict by releasing a vasoconstrictor chemical, usually ATP
Does methamphetemines cause constricted pupils?
no, uppers, acid & ecstacy will dialate your pupils. downers, like heroin and oxy's will constrict "pinpoint" your pupils
How is blood intrinsically controlled?
Blood flow is intrinsically controlled by the ability of local tissues to constrict or dilate arterioles that serve them. This alters the region flow depending on the body's needs. There are three types of intrinsic control: metabolic, myogenic, and endothelial.
What do arterioles in the dermis do in a cold environment?
They will allow the blood vessels to widen so that more heat loss can occur through evaporation. This is vasodilation.
Which sphincters function as regulatory valves that reduce the flow of blood through a network of capillaries when they contract and constrict the arterioles?
Precapillary sphincters
What will happen if the sphincter muscles of the arterioles to the skin constrict?
there are a lots of reasons.. the most common one would be cold. when your body temperature decreases it causes the arterioles under the skin to constrict which results in decrease in heat loss from the body. the other reasons would be neurogenic vasoconstriction during minor trauma to skin, and many more less common causes.
How does the circlutory system keep you cool?
When your body temperature is high, yourperipheral blood vessels dialate. This causes them to be closer to the surface of the body - thus releasing heat. When the body is too cold they constrict, keeping all of the heat in.
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.
How does reactive hyperemia work?
Decreased tissue blood flow due to occlusion will result in metabolic vasodilators accumulating in the extracellular fluid. The arterioles will hence dilate but the occlusion will still prevent normal blood flow. The occlusion is then removed and decreased resistance will increase blood flow. As the vasodilators are washed away, the arterioles constrict, and the blood flow returns to normal.
Does aspirin constrict or dialate blood vessels?
Neither--it is an anti-inflammatory, antipyretic and antiplatelet aggregator. In other words, it reduces inflammation, lowers fevers, keeps platelets from clumping together, and it also thins the blood.
Do pythons constrict or bite?
constrict
