Question

multiple choice question
in pulmonary ventilation, the movement of gases is between the ———— and the ————.
o atmosphere; systemic blood
o blood; tissue cells
o atmosphere; alveoli

Explanation:

Pulmonary ventilation, also known as breathing, is the process of moving air into and out of the lungs. The movement of gases occurs between the atmosphere (the air outside the body) and the alveoli (the tiny air - sacs in the lungs where gas exchange takes place).

• The option "atmosphere; systemic blood" is incorrect because systemic blood is involved in internal respiration (gas exchange between blood and tissue cells), not pulmonary ventilation.
• The option "blood; tissue cells" is related to internal respiration, not pulmonary ventilation.

Answer:

atmosphere; alveoli