By Cheryl D. Davis and Nancy A. Rice, Western Kentucky University Based on a case by Merle Heidemann and Gerald Urquhart, Michigan State University Another Can of Bull? Do Energy Drinks Really Provide a Source of Energy?

Do energy drinks really live up to their claims? 2 2

3 Which of the following best describes your use of energy drinks? A.I have never tried an energy drink. B.I drink an energy drink occasionally. C.I drink an energy drink whenever I need a “boost” of energy. D.I drink an energy drink almost every day.

4 I drink energy drinks because: A.They do give me an energy boost. B.They taste good. C.They give me an energy boost and they taste good. D.I don’t drink energy drinks.

The average cost of a canned energy drink is (8 ounce): 1.50 cents 2.$1 3.$2 4.$3

6 Energy use Energy conversionEnergy storage CO 2 + H 2 O + sunlight (Fats and carbohydrates)(Photosynthesis) Glucose O 2 + (CH 2 0) n Respiration Glucose + O 2 + ADP + Pi CO 2 + H 2 O + ATP (high yield!) Fermentation Glucose + ADP + P i Small organic molecules + ATP (low yield) But it is fast! Matter conversions that accompany energy transformations / transfers

7 7 ATP is used as an energy source for nearly all cellular metabolic processes. Which of the following macromolecules, if available, is used preferentially for ATP synthesis? A.Amino acids B.Caffeine C.Proteins D.Lipids E.Carbohydrates

8 8 Energy drinks typically contain large doses of caffeine. In fact, she learned that energy drinks may contain as much as 80 mg of caffeine, the equivalent of a cup of coffee. Compared to the 37 mg of caffeine in a Mountain Dew, or the 23 mg in a Coca- Cola Classic, that's a big punch! She also found that many energy drinks add other legal stimulants like ephedrine, guarana, and ginseng.

You can also put in “test slides” that start student discussion. I sometimes will put on a slide as a test question that is not a good test question. I try to either engage myself outside the room or tell students there are no questions to me. They can work in pairs of 2 if needed. The following is such a simple example.

If there are 2 apples and 2 oranges, how many medium pieces of fruit are in the fruit basket? Depends on the size of the fruit 4.8