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What would not result in the dilation of the feeder arterioles and opening of the precapillary sphincters in systemic capillary beds?
Wiki User
∙ 12y ago
a local increase in pH
Wiki User
∙ 12y ago
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What happens to arterioles when the body temperature falls?
I have same question It happens a dilation of the arterioles.
What is capillary dilation?
Dilated capillaries are also known as broken blood vessels. When several capillaries come together they appear red or similar to a bruise. They are common on the legs.
Why does arteriole dilation increase capillary pressure and flow but venous dilation does not?
Blood flow in the circulatory system is as follows: arteries->arterioles->capillaries->venules->veins. if you dilate the arteriole you are in fact lowering the resistance of the vessel (Poiseuille's Law), and it follows that net flux will increase. If capillary resistance remains the same, but the net flux has increased, then there will be an upwards change in pressure (Ohm's law). As far as veins go, it has a high compliance, which means that it can store large amounts of blood without raising venal pressure. If your question asked whether or not capillary pressure increases when venous dilates then the answer is no. Capillary blood flow will be less restricted as they flow into venules->vein and therefore will not have an increased pressure. If the question asked whether or not the venal pressure increases, then the answer is yes, but it is negligible (it has high compliance).
What is vasodilation?
The term vasodilation refers to the dilation or relaxation of the arterioles to allow more blood to an area. It serves to provide more nutrients to metabolically active tissue, or when to the skin as a means to release heat from the body.
How do blood pressure and total peripheral resistance change with exercise?
total peripheral resistance will decrease because of vaso dilation of local arterioles that are supplying the active muscles i.e,skeletal muscles. and blood pressure will increase for two reasons: increased cardiac output resulting from increased pumping activity of heart. because of vasoconstriction of arterioles every where else in the body
What is the triple response of intradermal injection of histamine?
On intradermal injection of histamine the following three reaction occurs 1. Red spot formation - due to intense capillary dilation 2. Wheal formation -due to exudation of fluid from capillaries and vanules 3. Flare formation - due to arteriolar dilation mediated by axon reflex
What Term means the expansion of?
Dilation
What is the procedure for dilation of the kidney?
The procedure for dilation of the kidney?
Does an enlargement of a photograph represent a dilation or a rotation?
Dilation
Why would it be wrong to say homeostasis prevents internal change?
dude homeostasis is the process by which the internal environment of ur body stays constant for example in warm blooded animals when the body temp rises u start sweating and ur arterioles near the skin dilate so in this example homeostasis has occurred and there has been an internal change(dilation of the arterioles and production of swear) therefore homeostasis doesn't prevent internal change
What is basal dilation?
Basal dilation is when you perform dilation on an organism while it is at basal level. That is when its level of activity is low.
What is the opposite of dilation in math?
The opposite of dilation in math is contraction
