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the constriction of the smooth muscles surrounding the arteriole closes the opening and reduces blood flow through the arteriole. With this reduced blood flow more blood is left in the artery
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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.
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.
What is the blood pressure of a capillary bed?
Pressure at capillary bed varies from 32mmHg at the arteriolar end to about 10mmHg at venous end, with an average of 17mmHg
In the absence of any regulatory mechanisms what effect do you think an increase in blood pressure would have on glomerular filtration rate?
Generally speaking, it would increase. However, it depends on the reason for the hypertension. For instance, if there is an obstruction or constriction of the renal artery (stenosis, malignancy, etc...) the physiologic affect would to increase the body's BP. This is due to the fact that the obstruction is decreasing hydrostatic pressure to the glomerulus, and transiently decreasing GFR. The body compensates by increasing BP to increase GFR. Patients that present with a renal artery stenosis could in fact be hypertensive with a decreased GFR.
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.
How does viscosity affect peripheral resistance?
If you increase the total peripheral resistance then the arterial blood pressure will increase.
How does blood viscosity affect blood flow?
Peripheral resistance
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
What are three things that affect blood pressure?
The three factors that contribute to arterial blood pressure cardiac output, blood volume, and resistance. These factors cause the variance between systolic and diastolic pressure.
What Conditions affect mean arterial pressure?
Some conditions affecting mean arterial pressure, or MAP, blood pressure, heart rate, resistance to blood flow in the vessels, and cardiac output which is the volume of blood pumped out by the heart. Increasing or decreasing any of the can change your mean arterial pressure and cause consequences to the organs in the body.
How is blood pressure affected when you increase dilation?
Blood pressure drops as dilation increases. This occurs because of decrease resistance.
What effects blood pressure?
the mood the person is is can affect their blood pressure such as depression and angry..
