Which of the following activity does not take place during pulmonary respiration

Options

A. Movement of the buccal cavity
B. Contraction and relaxation of sternohyal and pterohyal muscles
C. Successive opening and closing of mouth and external nostrils
D. All the above

Answer

C

Explanation

During pulmonary respiration, mouth remains closed all the time whereas nostrils are opened only when the air is taken in or passed out i.e. during the first stroke of inspiration and send stroke of expiration respectively.