Question

hey, can anyone please answer me these two mcqs
1. The overall total surface area for exchange of gases provided by human lung is about
a.60-80 m^2
b.70-90 m^2
c.50 m^2
d.60-70 m^2

2.Tidal volume is the air
a.Remaining in the lungs after forced expiration
b.Exchanged during normal breathing
c.Inhaled after normal inhalation.
d. Forcibly expelled after normal expiration.​

Answer 1

1. The overall total surface area for exchange of gases provided by human lung is about

70-90 m^2.

2.Tidal volume is the air Exchanged during normal breathing.

I hope it helps you my friend.