Topics:
Animal Physiology, Animal Refresher
Volume of Air in Normal Breathing
The volume of air inspired or expired during normal breathing is called:
- Vital capacity
- Tidal volume — Correct Answer
- Inspiratory capacity
- Functional residual capacity
Explanation:
Correct Answer: Tidal Volume
Tidal Volume (TV) is the volume of air inspired or expired during normal, quiet breathing. In humans, it is approximately 500 ml per breath.
Lung Volumes Quick Reference
| Volume | Definition | Approx. Value |
|---|---|---|
| Tidal Volume (TV) | Normal breathing in/out | ~500 ml |
| IRV | Extra air above TV on max inspiration | ~3000 ml |
| ERV | Extra air below TV on max expiration | ~1100 ml |
| RV | Air remaining after max expiration | ~1200 ml |
Derived Capacities
- Vital Capacity = IRV + TV + ERV = ~4600 ml
- Total Lung Capacity = IRV + TV + ERV + RV = ~5800 ml
- Inspiratory Capacity = TV + IRV = ~3500 ml
- Functional Residual Capacity = ERV + RV = ~2300 ml
📚 About this Topic — Animal Physiology
This multiple choice question is from Animal Physiology, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Physiology to strengthen your preparation.
