Question

"haemoglobin can be almost completely oxygeanted by an oxygen presuusre of 100 mmHg,which is present in the lungs. any higher oxygen pressure would have the same affect."

can't understand why there wil b same affaect for ant higher O2 pressure?

Answer 1

@SolomonZelman

Answer 2

@Abhisar

Answer 3

What can be other effect according to u ?

Answer 4

it could be more or less binding of
o2 with haemoglobin

Answer 5

at 100 mmHg haemoglobin is at its oxygen binding capacity

Answer 6

*its maximum

Answer 7

does higer pressure of O2 means more number of O2 molecules?

Answer 8

Yes

Answer 9

Partial pressure is directly proportional to mole fraction

Answer 10

how O2 pressure in atmosphere and in lungs is different?

Answer 11

You are not getting the point. Suppose u go to higher altitudes then the pressure of oxygen wil decrease, also suppose u are trapped inside a burning building then the availability of oxygen will be less and hence its pressure will also be less. Now in these conditions haemoglobin of blood will be carrying less oxygen

Answer 12

The oxygen cylinders or the ventilators u see in hospitals do nothing but supply the patients with concentrated oxygen. Concentration is directly proportional to partial pressure.

Answer 13

i got that point :)
i was trying to ask this:- The alveolar oxygen partial pressure is lower than the atmospheric O2 partial pressure ..

Answer 14

i got this answer .. c if it is ryt:-
Firstly, as the air enters the lungs, it is humidified by the upper airway and thus the partial pressure of water vapour (47 mmHg) reduces the oxygen partial pressure to about 150 mmHg.
The rest of the difference is due to the continual uptake of oxygen by the pulmonary capillaries, and the continual diffusion of CO2 out of the capillaries into the alveoli.

Answer 15

Yes that looks nice and valid

Answer 16

:) i feels good wen a confusins doesnt reamina confusin any more :) ..thanks @Abhisar

Answer 17

as the air enters the lungs, it is humidified by the upper airway and thus the partial pressure of water vapour (47 mmHg) reduces the oxygen partial pressure to about 150 mmHg.


this is because pressure is directly proportional to mole fraction [concentration]

Answer 18

yup got it :)

Answer 19

\(\rlap{\color{blue}{\huge\bigstar}\huge \color{blue}{ \text{You're Most Welcome! }}\color{blue}\bigstar}{\; \color{aqua}{\huge\bigstar}\huge \color{aqua}{\text{You're Most Welcome! }}\color{aqua}\bigstar}\)
\(~~~~~~~~~~~~~~~~~~~~~~~~~~~\color{green}{\huge\ddot\smile}\color{blue}{\huge\ddot\smile}\color{pink}{\huge\ddot\smile}\color{red}{\huge\ddot\smile}\color{yellow}{\huge\ddot\smile}\)