useless trivia: What Word Means: To Cease - A Failing?

Questions

In the United States, ---------- teeth are knocked out annually.?

Brain damage occurs at an internal temperature of ---------- degrees Fahrenheit.?

Despite accounting for just one-fiftieth of body weight, the ---------- burns as much as one-fifth of our daily caloric intake. ?

---------- of workers on the Panama Canal suffered from malaria.?

82% of workers on the ---------- Canal suffered from malaria.?