The primary active ingredient in caffeine is:
a. methylxanthine.
b. theobromine.
c. ephedrine.
d. d-caffeine.
Question 2
Athletes in which of the following sports typically have similar nutrient needs?
a. Football, basketball, baseball
b. Soccer, ice hockey, tennis
c. Gymnastics, handball, javelin
d. Cross-country skiing, ski jumping, figure skating