padi IDC theory – SCUBA physiology

Q11
Oxygen is administered to cases of decompression sickness to
d)   Help wash out excess nitrogen from the body

Q12
What increases the risk of lung expansion injuries?
a)    Smoking vigorously before diving
b)   Holding the breath while ascending
c)    Choking on a dislodged mouthpiece while diving
d)   All of the above