The human body secretes more pain-blocking hormones late at night than during the day. Consequently, surgical patients operated on at night need less anesthesia. Since larger amounts of anesthesia pose greater risks for patients, the risks of surgery could be reduced if operations routinely took place at night.
Which of the following, if true, argues most strongly against the view that surgical risks could be reduced by scheduling operations at night?

Question

Examsnet · Accepted Answer

Correct Answer is :  Manual dexterity and mental alertness are lower in the late night than they are during the day, even in people accustomed to working at night.

GMAT Verbal Reasoning Practice Test 6