Can any1 help me with this one?

Question

Normal partial pressure (mmHg) values for blood leaving the left ventricle are ______________ and the normal partial pressure (mmHg) values for the blood leaving the right ventricle are ______________.

PO2 of 100 & PCO2 of 46.........PO2 of 40 & PCO2 of 46
PO2 of 40 & PCO2 of 40.........PO2 of 100 & PCO2 of 40
PO2 of 40 & PCO2 of 46.........PO2 of 100 & PCO2 of 40
PO2 of 100 & PCO2 of 40........PO2 of 40 & PCO2 of 46
none of the above

Answer 1

Blood leaving the left ventericle is travelling to the lungs from the body and is depleted of O2 and high in CO2... Leaving the right ventricle it is travelling to the body from the lungs, so it is rich in O2 and lower in CO2, which was eliminated in the lungs...

So your answer is:
PO2 of 40 & PCO2 of 46... PO2 of 100 & PCO2 of 40

Answer 2

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Answer 3

Partial Pressures of O2 and CO2 in the body (normal, resting conditions):

Alveoli ( blood leaving the left ventricle)
PO2 = 100 mm Hg
PCO2 = 40 mm Hg


Alveolar capillaries
Entering the alveolar capillaries ( leaving the right ventricle)
PO2 = 40 mm Hg (relatively low because this blood has just returned from the systemic circulation & has lost much of its oxygen)
PCO2 = 45 mm Hg (relatively high because the blood returning from the systemic circulation has picked up carbon dioxide)

While in the alveolar capillaries, the diffusion of gasses occurs: oxygen diffuses from the alveoli into the blood & carbon dioxide from the blood into the alveoli.

Leaving the alveolar capillaries
PO2 = 100 mm Hg
PCO2 = 40 mm Hg
Blood leaving the alveolar capillaries returns to the left atrium & is pumped by the left ventricle into the systemic circulation. This blood travels through arteries & arterioles and into the systemic, or body, capillaries. As blood travels through arteries & arterioles, no gas exchange occurs

.
Entering the systemic capillaries
PO2 = 100 mm Hg
PCO2 = 40 mm Hg

Body cells (resting conditions)
PO2 = 40 mm Hg
PCO2 = 45 mm Hg
Because of the differences in partial pressures of oxygen & carbon dioxide in the systemic capillaries & the body cells, oxygen diffuses from the blood & into the cells, while carbon dioxide diffuses from the cells into the blood.


Leaving the systemic capillaries
PO2 = 40 mm Hg
PCO2 = 45 mm Hg
Blood leaving the systemic capillaries returns to the heart (right atrium) via venules & veins (and no gas exchange occurs while blood is in venules & veins). This blood is then pumped to the lungs (and the alveolar capillaries) by the right ventricle.

I'm sure this is an exercise in futility as you very well know the answer to this question already. ! The answer therefore is #4.

Answer 4

Isn't that cheating?

Answer 5

see what happens when folks study the material, they have the answers

Answer 6

try google. I have no idea :S