Gas flows into the lungs of mammals during inspiration because

Question

Gas flows into the lungs of mammals during inspiration because (A) The pressure in the lungs falls below atmospheric pressure. (B) The volume of the lungs decreases. (C) The pressure in the lungs rises above atmospheric pressure. (D) The diaphragm moves upward toward the lungs.

Tardigrade Admin · Accepted Answer

Inspiration in the mammalian lung occurs by means of negative pressure produced by contraction of the diaphragm. Thus, the pressure in the lungs falls below atmospheric pressure.

Q. Gas flows into the lungs of mammals during inspiration because

The pressure in the lungs falls below atmospheric pressure.

The volume of the lungs decreases.

The pressure in the lungs rises above atmospheric pressure.

The diaphragm moves upward toward the lungs.

Inspiration in the mammalian lung occurs by means of negative pressure produced by contraction of the diaphragm. Thus, the pressure in the lungs falls below atmospheric pressure.