Question

Normal tidal volume in adult is approximately

• A. 100 mL
• B. 500 mL
• C. 1000 mL
• D. 1500 mL

Hint:

Normal adult tidal volume is approximately \(500\ \text{mL}\).

Answer 1

The Correct Option is B

Concept:
Tidal volume is the amount of air inspired or expired during normal quiet breathing.

Step 1: Understanding tidal volume.
During normal breathing, a fixed amount of air moves in and out of the lungs with each breath.

Step 2: Normal value.
In a normal healthy adult, tidal volume is approximately \(500\ \text{mL}\).

Step 3: Importance.
Tidal volume helps determine pulmonary ventilation and respiratory efficiency.

Step 4: Checking options.
100 mL is too low for normal tidal volume.
1000 mL and 1500 mL are higher values and may be seen during deep breathing.
Normal quiet tidal volume is about 500 mL. \[ \boxed{500\ \text{mL}} \]