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Does the increase in pulse and blood pressure because of exercise reflect changes in cardiac output or peripheral resistance?
Wiki User
∙ 12y ago
Cardiac Output is the product of Stroke Volume and Hear Rate.
Increase in either one will increase in Cardiac OutPut.
THe increase in HR could be due to decrease of Parasympatheic Drive, Incresae in Sympathetic Drive. (norepiphrine increase HR)
Peripheral REsistance decrease because of vasodilation during exercise in the working musclse because of vasodilator metabolites (adenosine, K+) inhibit Norepinphrine release locally.
I think the increase in pulse and blood pressure duing exercise is to meet the oxygen demand of the working tissue. In unfir person you can see that they acheive that mostly by increasing heart rate. However when you see the fit person doing the same workload, they might have lesser increase of HR compare to the unfit person because they have a stroger stroke volume.
I hope this helps
Wiki User
∙ 12y ago
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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.
How does viscosity affect peripheral resistance?
If you increase the total peripheral resistance then the arterial blood pressure will increase.
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 causes peripheral resistance?
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.
Why does diastolic blood pressure decrease during exercise?
Diastolic pressure remains constant or less than normal regardless of exercise intensity due to decreased peripheral resistance as increased metabolism will cause vasodilatation so decrease resistance due toABP = COP X Peripheral resistance
What is the relationship between peripheral resistance and blood pressure?
Systolic BP is a measure of blood pressure while the heart is pumping; diastolic BP is a measure of blood pressure while the heart is not pumping. BP is the pressure of the blood on the walls of the blood vessels.
What are the factors related to blood pressure?
Peripheral resistance and cardiac output
What is the action of angiotensin 2 that increases blood pressure?
increasing peripheral resistance
4 factors that affect blood pressure?
There are four factors that affect the blood pressure. The things that can affect blood pressure are stress, genetics, a high salt intake, and exercise.
Sympathetic system affects blood pressure by affecting cardiac output and total peripheral resistance?
The sympathetic nervous system increases blood pressure by increasing cardiac output, which is the amount of blood ejected by the heart per minute. It also increases total peripheral resistance, which is the resistance to blood flow in the blood vessels. These actions help to increase blood pressure in response to stress or other physiological demands.
What is the principles relating to blood flow and pressure and resistance?
Blood pressure = (Blood flow)(Resistance). This equation is usually found in the following form: MAP = (CO)(R) Where MAP is the mean arterial pressure CO is the cardiac output R is the peripheral resistance
How Resistance increase as you press probes?
Resistance decreases, not increases, as you apply pressure to probes.
