What is the average volume of air that can be exhaled following a normal exhalation in adult males?

The average volume of air that can be exhaled following a normal exhalation in adult males is approximately 1200 mL. This volume is known as the expiratory reserve volume (ERV), which refers specifically to the additional air that can be exhaled after a normal tidal expiration (the volume of air exhaled during normal breathing).

In general, the total lung capacity and various lung volumes can vary based on factors such as age, body size, and fitness level. However, for a healthy adult male, the ERV is typically around 1200 mL, making this a standard measure in respiratory physiology.

The other answer choices, while they represent measurements of lung volumes, do not accurately reflect the expiratory reserve volume following typical breathing in adult males. This understanding of normal lung capacity is crucial for emergency medical technicians as they assess and manage respiratory function in patients.