During Inspiration, Why Does Air Move into the Lungs

question 1

Multiple Choice

During inspiration, why does air move into the lungs?

• A) The pressure inside the lungs has decreased below atmospheric pressure.
• B) The pressure inside the lungs has increased above atmospheric pressure.
• C) The increased pressure in the lungs has opened up collapsed airways, so air can flow in.
• D) The space (volume) within the lungs has decreased, allowing air flow into the lungs.

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Definitions:

Hemoglobin

The combination of a protein and iron pigment in the red blood cells that attracts and carries oxygen in the body.

Red Blood Cells

Cells found in blood that are responsible for carrying oxygen from the lungs to the body's tissues and returning carbon dioxide from the tissues back to the lungs.

Anemia

A condition characterized by a lack of enough healthy red blood cells to carry adequate oxygen to the body's tissues, resulting in fatigue and weakness.

Hematocrit

A blood test measurement that indicates the percentage of red blood cells in a volume of blood.