n apneustic breathing, which is practiced by most marine mammals: A. A small amount of air is kept in the lungs before diving B. A large amount of air is kept in the mouth before diving C. Normal breathing is maintained before diving D. Several deep breaths are taken before exhaling and diving E. No actual breathing takes place before diving

Complete Question: In apneustic breathing, which is practiced by most marine mammals:

A. A small amount of air is kept in the lungs before diving

B. A large amount of air is kept in the mouth before diving

C. Normal breathing is maintained before diving

D. Several deep breaths are taken before exhaling and diving

E. No actual breathing takes place before diving

D. Several deep breaths are taken before exhaling and diving.

Explanation:

Common dolphins, whales and other marine mammals are known to undergo apneustic breathing. This breathing process is characterized by periodic or several breathe inhalation, followed by holding their breath and then exhaling them.

Marine mammals can afterwards, went on to dive. This process prevent high water loss out. Thus, they make fewer respirations while maximizing the amount of oxygen produced for optimal consumption.

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