Question

What is the primary component of an exhaled breath?

A. N2

B. O2

C. CO2

D. H2O​

Answer 1

Answer:

is the primary component of an exhaled breath?

A. N2

B. O2

C. CO2

D. H2O

Explanation:

Answers is

the

B. O2

Answer 2

The primary component of an exhaled breath has to be CO₂.

• The  partial pressure of CO₂ at the tissue level is more than in blood therefore the CO₂ diffuses from tissue to blood at the tissue level.
• Then at the alveolar level the partial pressure of  CO₂ in alveoli is less than that in blood so the blood diffuses from the blood into the alveoli and from the alveoli the CO₂ ultimately gets exhales out of the body.
• In fact CO₂  is the gas which causes the urge to exhale .