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An arteriole has a diameter of 0.033 mm and carries blood at the rate of 6.3 ? 1

ID: 2281748 • Letter: A

Question

An arteriole has a diameter of 0.033 mm and carries blood at the rate of6.3 ? 10?6 cm3/s. (a) What is the speed of the blood in the arteriole?
cm/s

(b) Suppose the arteriole branches into 340 capillaries, each with a diameter of 4.0 ? 10?6 m. What is the blood speed in the capillaries? (The low speed in capillaries is beneficial; it promotes the diffusion of materials to and from the blood.)
cm/s An arteriole has a diameter of 0.033 mm and carries blood at the rate of6.3 ? 10?6 cm3/s. (a) What is the speed of the blood in the arteriole?
cm/s

(b) Suppose the arteriole branches into 340 capillaries, each with a diameter of 4.0 ? 10?6 m. What is the blood speed in the capillaries? (The low speed in capillaries is beneficial; it promotes the diffusion of materials to and from the blood.)
cm/s (a) What is the speed of the blood in the arteriole?
cm/s

(b) Suppose the arteriole branches into 340 capillaries, each with a diameter of 4.0 ? 10?6 m. What is the blood speed in the capillaries? (The low speed in capillaries is beneficial; it promotes the diffusion of materials to and from the blood.)
cm/s

Explanation / Answer

a) here ,

pi*(0.033*10^-1 /2)^2 * v = 6.3 ? 10?6

V = 0.77 cm/s

b) here,

340 * pi* (4.0 ? 10?4 ) /4 * v= 6.3*10^-6

V = 0.147 cm/s

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