1. A recent news story (not really!) highlighted thenear-drowning of a Navy Seal recruit that deliberatelyhyperventilated before diving into the water. The recruit waspracticing an exercise that required them to hold their breathunderwater for an extended period of time. The recruit reasonedthat hyperventilation prior to the exercise would alter theirphysiology in a way that would increase the length of time theycould hold their breath. Explain the physiological basis of thisbelief (use the terms hypocapnia and hypercapnia in youranswer)
2. The digestive system and respiratory system share somestructures, yet others must be kept separate to prevent choking.Describe how substances that are intended to be swallowed may get“misdirected” and lead to choking. Be sure to include allstructures involved.
