What Is the Rate of Diffusion in the Gas- Exchange

question 7

Multiple Choice

What is the rate of diffusion in the gas- exchange organ of an air- breathing animal where the area for gas exchange in the lung is 200 mm², the diffusion constant is 0.08, the PO₂ partial pressure of oxygen) of the air in the lung is 140 mm Hg, the PO₂ in blood flowing into the lung is 90 mmHg, and the thickness of the gas exchange membrane is 0.001 mm?

• A) 00032
• B) 800,000
• C) 125
• D) 10,000,000

---

Definitions:

Efficient

The state of achieving a maximum output from given resources, with minimal waste or inefficiency.

Normative Statement

Prescriptive assertions that express judgments about whether a situation is desirable or undesirable, reflecting values rather than facts.

Positive Statement

A factual claim about how the world actually works, verifiable by observation or experience.

Production Possibilities Frontier

An illustration representing the peak production capabilities for two different items, utilizing a specific combination of resources and factors.