Daniel, the swimmer with the fastest time on the Springfield College swim team, routinely hyperventilates before a meet, as he says, “to sock some more oxygen into my lungs so I can swim longer...

Daniel, the swimmer with the fastest time on the Springfield College swim team, routinely hyperventilates before a meet, as he says, “to sock some more oxygen into my lungs so I can swim longer without having to breathe.” First of all, what basic fact about oxygen loading has Daniel forgotten (a lapse leading to false thinking)? Second, how is Daniel jeopardizing not only his time but his life?

A surgeon removed three adjacent bronchopulmonary segments from the left lung of a patient with TB. Almost half of the lung was removed, yet there was no severe bleeding, and relatively few blood vessels had to be cauterized (closed off). Why was the surgery so easy to perform?