To produce a normal tidal volume, the expiratory muscles must be stimulated.

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Normal tidal volume refers to the amount of air that is inhaled and exhaled during normal breathing, without the need for voluntary effort or extra stimulation. The respiratory muscles, including the diaphragm and external intercostal muscles, are responsible for this type of breathing, and they are automatically activated without the need for conscious effort. Therefore, expiratory muscles do not need to be specifically stimulated to produce normal tidal volume.

To Produce a Normal Tidal Volume, the Expiratory Muscles Must