Twenty sprint cyclists were randomly selected to be in a study designed to test the effectiveness of 12 weeks of creatine supplementation on performance. Ten cyclists received a creatine supplement for three months while the other ten received a placebo. The cyclists did not know which supplement they were taking, while the researcher did have this information. The study was a(n) ____ study.
A) randomized
B) double-blind
C) crossover
D) unbiased
Q. 2Under the most demanding conditions (e.g., very high-intensity exercise), ATP concentrations in skeletal muscles are not likely to drop more than:
a. 5-10.
b. 10-20.
c. 20-30.
d. 40-50.
Q. 3Twenty sprint cyclists were randomly selected to be in a study designed to test the effectiveness of 12 weeks of creatine supplementation on performance. Ten cyclists received a creatine supplement for three months while the other ten received a placebo. The cyclists did not know which supplement they were taking, while the researcher did have this information. This is an example of a(n) ____ study.
A) case
B) epidemiological
C) experimental
D) clinical
Q. 4The two most common factors that influence enzyme activity are:
a. time and temperature.
b. temperature and pH.
c. pH and oxygen availability.
d. oxygen availability and time.
Q. 5What are the weakest of all scientific findings?
A) case studies
B) epidemiological studies
C) correlational studies
D) experimental studies
Q. 6Which of the following is an endergonic reaction?
a. The releasing (triggering) of a mouse trap
b. The release of water from behind a dam
c. The breakdown of ATP to ADP
d. The rephosporylation of ADP
Q. 7An intake of 3 to 12 grams of ____ per kilogram (kg) of body weight per day is recommended for athletes.
A) carbohydrate
B) protein
C) fat
D) fluid
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