answerreer tree to cneck wit a carculator 2. Blood pressure at the exit of the h

Question

answerreer tree to cneck wit a carculator 2. Blood pressure at the exit of the heart is 100 mmHg and upon return it is zero at the entrance to the heart. If Ls S the pressure drop along the D constriction in figure 2 is approx. blood 450 Pa, what fraction of the total available blood pressure would this represent? (Calculator permitted) Figure 3. /Air moves through the human trachea at 3 m/s during inhalation. A constriction in the trachea leads to a doubling in the air speed. Find (approximately) the pressure change at the constriction (versus that in an unconstructed trachca). Use a density for air of 1.2 kg/m Comment on the significance of this pressure change Determine the Reynolds number associated with the swimming motion of 0 4. a./a microscopic (Chlamydomonas) alga in water at 20°C if it has an effective diameter of 10 um. The swimming speed of the algac is 100 Page 2 of 4

Explanation / Answer

let,

at exit, blood pressure , P1=100mm of Hg

here,

height rised, h=100mm

use,

total pressuer,

P1=rho_blood*g*h

P1=1060*9.8*100*10^-3

P1=1038.8 Pascal

and

P2=450 Pascal

===> P1/P2=1038.8/(450)

P1/P2=2.308

fraction of the total available blood pressure is 2.308

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