Which of the following activities does not ta | vedclass

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(C) Pulmonary respiration in amphibians like frogs involves a buccal pump mechanism. During this process,the mouth remains closed at all times. The ex

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Successive opening and closing of the mouth and external nostrils

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(C) Pulmonary respiration in amphibians like frogs involves a buccal pump mechanism. During this process,the mouth remains closed at all times. The external nostrils open and close in a coordinated manner to allow air intake and expulsion. Specifically,the buccal cavity moves,and the sternohyal and pterohyal muscles contract and relax to change the volume of the buccal cavity. Therefore,the activity of 'successive opening and closing of the mouth' does not occur because the mouth remains closed throughout the process.

Which of the following activities does not take place during pulmonary respiration in amphibians (e.g.,frogs)?

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