Question

What are the four integrated processes of external respiration?

Option 1: Oxygen transport, carbon dioxide transport, diffusion, filtration
Option 2: Inhalation, exhalation, ventilation, perfusion
Option 3: Ventilation, oxygen transport, carbon dioxide transport, diffusion
Option 4: Filtration, perfusion, exhalation, inhalation

Answer 1

The four processes of external respiration are Ventilation, Oxygen Transport, Carbon Dioxide Transport, and Diffusion, making Option 3 the correct answer.

Step-by-step explanation:

The four integrated processes of external respiration are:

1. Ventilation
2. Oxygen Transport
3. Carbon Dioxide Transport
4. Diffusion

Ventilation is the process of moving air into and out of the alveoli. Perfusion affects the flow of blood in the capillaries and is crucial for gas exchange. Oxygen transport then refers to how oxygen, having diffused across the respiratory membrane from the alveolus to the capillary, is carried by the blood to tissues. Carbon dioxide transport is the movement of carbon dioxide in the opposite direction—from the tissues to the alveoli—where it can be expelled from the body.

Therefore, the correct option that lists the four processes of external respiration is Option 3: Ventilation, Oxygen Transport, Carbon Dioxide Transport, Diffusion.