Mechanism Of Breathing

To determine the Expiratory Capacity (EC) of the athlete, we need to understand the relevant respiratory volumes and their relationships. The Expiratory Capacity is defined as the total volume of air that can be expired after a normal inspiration. It can be calculated using the following formula:

EC = \text{Tidal Volume (TV)} + \text{Expiratory Reserve Volume (ERV)}

Here are the values given in the question:

• Tidal Volume (TV) = 500 mL
• Expiratory Reserve Volume (ERV) = 1000 mL

Substituting the given values into the formula, we get:

EC = 500 \, \text{mL} + 1000 \, \text{mL}

Calculating the above expression gives us:

EC = 1500 \, \text{mL}

Therefore, the Expiratory Capacity of the athlete is 1500 mL. This value corresponds to the correct answer choice: 1500 mL.