Question

When a sea diver goes very deep he has to breathe on compressed air at high pressure. After some time, he loses his strength to work and feel drowsy. This is because of:

• A. Compressed air
• B. More carbon dioxide diffusing into molecules
• C. More nitrogen diffusing in blood and body fats
• D. Nervous system does not work properly

Answer 1

The correct option is C More nitrogen diffusing in blood and body fats

When a sea diver descends to great depths, he has to breathe on compressed air under high pressure otherwise his lungs will collapse. This increase concentration of $N_2$ in alveoli and subsequently in blood. From blood, $N_2$ diffuses into muscles and body fats. This make the diver lose his strengths and work capacity, and he feels drowsy.