Which of the following is a correct statement about the energy systems and fuels used by the body?
a. After 20 minutes of sustained activity, fuel for the muscles primarily comes from glucose that is broken down by glycolysis.
b. About 90% of the fuel is derived from fat at rest.
c. All energy systems are used at all times, but one system which dominates depending on intensity and conditioning of athlete.
d. An anaerobic energy system is the most efficient way to fuel the body for prolonged activity.
e. The lactic acid system is the predominant source of energy after 3 minutes of activity and until activity has reached 20 minutes in length.
Answer: C
You might also like to view...
Which hormone works to lower blood glucose?
A. glucagon B. insulin C. epinephrine D. cortisol
Successful weight-loss maintenance means achieving a minimum weight loss of ________ percent of initial body weight and maintaining the loss for at least ________.
a. 5–10, 3 months b. 5–10, 6 months c. 5–10, 1 year d. 10–15, 6 months e. 10–15, 1 year
Which of the following is NOT among the general characteristics of the fat-soluble vitamins?
a. Excesses are eliminated by the kidneys b. Absorption is via the lymphatic circulation c. Several of them require protein carriers for transport d. They can be stored in relatively large amounts in certain body tissues
Race or ethnicity does not affect the risk of developing obesity among children and adolescents
a. True b. False Indicate whether the statement is true or false