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What is the average tidal volume in a normal adult?

  1. 250ml

  2. 500ml

  3. 750ml

  4. 1000ml

The correct answer is: 500ml

The average tidal volume in a normal adult is approximately 500ml. Tidal volume refers to the amount of air that is inhaled or exhaled during normal, restful breathing. This volume can vary among individuals based on factors such as age, gender, body size, and overall health, but 500ml is generally considered an average value for a typical adult at rest. Understanding tidal volume is important in fields such as respiratory therapy and medicine, where assessing a patient’s lung function and ventilation is crucial. Recognizing this average helps healthcare professionals set appropriate ventilation parameters and understand respiratory mechanics in various clinical scenarios.