Year: 2021
Topic: Breathing and Exchange of Gases
Time :
1.
The partial pressures (in mmHg) of oxygen (O
2
) and carbon dioxide (CO
2
) at alveoli (the site of diffusion) are:
(1). pO
2
=104 and pCO
2
= 40
(2). pO
2
= 40 and pCO
2
=45
(3). pO
2
= 95 and pCO
2
= 40
(4). pO
2
= 159 and pCO
2
= 0.3