Question

What is the normal Tidal Volume (TV) in a healthy adult human?

• A. 200 mL
• B. 500 mL
• C. 1000 mL
• D. 2000 mL

Hint:

Important lung volumes: Tidal Volume (TV) → \( \approx 500\,mL \) Inspiratory Reserve Volume (IRV) → \( \approx 2500 - 3000\,mL \) Expiratory Reserve Volume (ERV) → \( \approx 1000 - 1100\,mL \)

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
The question asks for the standard physiological value of Tidal Volume in humans.
Step 3: Detailed Explanation:
1. Tidal Volume (TV) is the volume of air inspired or expired during a single normal, quiet breath.
2. In a healthy adult male, this value is typically around \(500 \, mL\).
3. Out of this \(500 \, mL\), only about \(350 \, mL\) reaches the alveoli for gas exchange, while the remaining \(150 \, mL\) stays in the respiratory passages (dead space).
4. A healthy man can inspire or expire approximately \(6000\) to \(8000 \, mL\) of air per minute (Minute Volume).
Step 4: Final Answer:
The normal Tidal Volume is \(500 \, mL\) (B).