Which of the Following Is the Most Important Ventilatory Function

question 59

Multiple Choice

Which of the following is the most important ventilatory function of the scalene muscles?

• A) Activate if intrathoracic pressure falls to -40 cm H₂O.
• B) Elevate and fix the first seven ribs.
• C) Lift upper chest particularly during times of high ventilatory demand.
• D) Support the trachea within the thorax during heavy exercise.

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