What is the difference between tidal volume and vital capacity in the context of lung volumes?

• A. Tidal volume is the maximum amount of air a person can exhale after a maximum inhalation, while vital capacity is the amount of air inhaled or exhaled during normal breathing.
• B. Tidal volume is the total lung capacity, while vital capacity is the residual volume left in the lungs after exhalation.
• C. Tidal volume is the amount of air inhaled or exhaled during normal breathing, while vital capacity is the maximum amount of air a person can exhale after a maximum inhalation.
• D. Tidal volume is the amount of air left in the lungs after a normal exhalation, while vital capacity is the total lung capacity.

Answer: (C)

Verified step by step guidance

1. Identify the definitions of tidal volume and vital capacity. Tidal volume is the amount of air inhaled or exhaled during normal breathing, while vital capacity is the maximum amount of air a person can exhale after a maximum inhalation.
2. Understand the context of lung volumes. Lung volumes refer to the different capacities of air the lungs can hold during various phases of the respiratory cycle.
3. Differentiate between the two terms based on their definitions. Tidal volume is associated with normal, relaxed breathing, whereas vital capacity involves a full inhalation followed by a full exhalation.
4. Recognize the physiological significance of each term. Tidal volume is crucial for understanding normal respiratory function, while vital capacity is important for assessing the maximum functional capacity of the lungs.
5. Review the incorrect statements provided in the problem to reinforce the correct definitions and ensure a clear understanding of the differences between tidal volume and vital capacity.