A) absence of breathing
B) decreased ventilation
C) increased ventilation
D) laboured breathing
Correct Answer: A
Solution :
Apnoea or breath holding is the ceasing of the movement of respiratory medium. Apnoea not only occurs during diving. Most reptiles at rest on land can go for long intervals without taking the breath. As apnoea continues oxygen from the lungs depleted and pulmonary perfusion declines until just before another breath. Ventilation or breathing is the active process of moving the respiratory medium water or air across the exchange surface.
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