During a marathon race, a runner's blood flow increases to 5.0 times her resting rate. Her blood's viscosity has dropped to 85.0% of its normal value, and the blood pressure difference across the circulatory system has increased by 50.0%. By what factor has the average radii of her blood vessels increased?

This is a practice problem

If the viscosity of blood is 2.1x 10^-3 pa.s, and capillary of 100 um radius has a length of 4cm , then the blood flow resistance a cross this capillary be * 214x10^12 pa.sm^-3 2.14x10^12 pa.sm^-3 0.214 x10^12 pa.sm^-3 0.00214x10^12 pa.sm^-3

Using the data of the above figure for the circulatory system (laid outhorizontally), and assuming a typical blood flow rate of 5.0 L per minute throughout the vascular system, what is the blood flow speed in the venules?

A medical technician is trying to determine what percentage of a patient's artery is blocked by plaque. To do this, she measures the blood pressure just before the region of blockage and finds that it is P₁, while in the region of blockage it is P2. Furthermore, she knows that blood flowing through the normal artery just before the point of blockage is traveling at v₁, and the density of this patient's blood is p. The patient is laying down so there are no differential effects due to gravity. a. Symbolically, what is the ratio of the artery radius at the blockage, r2, to the ratio of the artery radius at the blockage, r₁? (find r₂/r₁) b. Find the numerical value of r2/r1. P₁ = 1.20x104 Pa, P₂=1.15×104 Pa, v₁ =30.0 cm/s, p = 1060 kg/m³.

The blood speed in a normal segment of a horizontal artery is 0.14 m/s. An abnormal segment of the artery isnarrowed by an arteriosclerotic plaque down to one-fifth its normal cross-sectional area. What is the difference in bloodpressures between the normal and constricted segments of the artery? (The density of the blood is 1060 kg/m3)

The human ciculatory system has approximately 109 capillary vessels. Each vessel has a diameter of about 8.4 μm. Assuming cardiac output is 4.2 L/min, determine the average velocity (m/s) of blood flow through each capillary vessel.

The blood flow rate through the aorta is measured to be 107.3 cm^3/s, and an adult is measured to have 5.02 L of blood. How long does it take for all of your blood to pass through the aorta?   If the adult's aorta has a diamter of 2.05 cm, what is the speed of blood as it flows through the aorta?

Your dorm has an amateur hour every Friday night. Since you have a tremendous lung capacity, you challenge everyone to a lung capacity competition which is conducted by blowing air through one straw which in turn pulls water up through another straw, as shown in the figure. The straws are identical and have a diameter of 0.58 cm, you are able to exhale 1.4 liters of air through the horizontal straw in as little as 2 seconds, and the density of air is 1.29 kg/m³. Determine the following. (a) speed of the air as it travels through the horizontal straw m/s (b) height to which water rises in the vertical straw cm

A 79-kg swami lies on a bed of nails with his body supported by 2,000 nails. The area of the point of each nail is 1 mm^2. If the threshold pressure for pain is 1 mpa, how unpleasant is the experience for the swami? What if the point area is 0.1mm^2?