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Peripheral resistance is the force against blood flow. In most cases, an increase in peripheral resistance would be caused by an increase in vasoconstriction, which would decrease blood flow. Other factors can influence vasoconstriction, such as circulating angiotensin II levels, cortisol levels, drugs such as cocaine and other adrenergic agonists, blood volume, atherosclerosis, emboli, renal diseases and increased intra-cranial pressure. An increase in blood pressure will also be caused by vasoconstriction and the mentioned factors.
Wiki User
∙ 15y ago
Wiki User
∙ 13y agoThe heart has to push blood around the body through a network of blood vessels which get smaller as they get further away - towards the peripheral parts and deeper into the tissues of all the body parts. It requires a lot of force to push blood thru all these channels especially small ones. Further, these small arterioles can change size getting narrower and therefore increasing the peripheral resistance that the heart has to push against as it pumps. The control of the size of these vessels is a means by which the body (and drugs) alter peripheral resistance - resulting in a change in blood pressure.
Wiki User
∙ 15y agoExercise.
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What are the factors affecting peripheral resistance which influence BP?
There are three factors that increase peripheral resistance. These factors include autonomic activity, pharmacologic agents, and blood viscosity. Each factor increases the constriction of arteries, which in turn causes peripheral resistance.
What is the explanation for the term total peripheral resistance?
Total peripheral resistance is the sum of the resistance of all peripheral vasculature in the systemic circulation.
What is main site of peripheral resistance?
arterioles offer maximum peripheral resistance .Skin and skeletal muscle blood vessels represent most imp. site of peripheral resistance.
Does exercise Change in cardiac output or in peripheral resistance?
Both, peripheral resistance decreases and cardiac output increases.
Name two factors that increase peripheral resistance?
Peripheral resistance can be increased by an increase in blood volume and the constricting of blood vessels.
Does dehydration increase peripheral resistance?
yes
What center in the medulla can alter peripheral resistance?
Hypothalamus
What is blood flow directly proportional to?
Peripheral resistance
Decreased peripheral resistance to blood flow?
Anemia
What is the event primarily responsible for peripheral resistance?
Constriction of arterioles
How does blood viscosity affect blood flow?
Peripheral resistance
Peripheral resistance is maintained by increasing or decreasing the size of?
Increasing
