Which of the following is a characteristic of fuel use by muscles?
a. At rest, about 90% of the fuel is derived from glucose.
b. At rest, about 90% of the fuel is derived from fat.
c. Muscles always use a mixture of fuels at rest or during physical activity.
d. During physical activity, amino acids contribute most of the fuel.
e. During the first 10 seconds of physical activity, the lactic acid system is the predominant source of energy.
ANS: C
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In genetically susceptible people the destruction of beta cells in the pancreas may be caused by:
A) viral infection. B) significant weight gain. C) eating disorders. D) high-fructose corn syrup. E) a, d
It is difficult to meet vitamin and mineral needs via foods at caloric levels below _____.
A. 1600 B. 1800 C. 12000 D. 2200 E. 2400
Explain the components of the guide to therapeutic lifestyle changes (TLC), listing examples from each of the segments
Tamara and Martin are expecting their first child, a girl, in a few months. Tamara has a family history of type 2 diabetes and her mother had gestational diabetes when she was pregnant with her. Tamara has been overweight for most of her adult life, but began exercising and improved her diet before becoming pregnant. Tamara has recently been tested for gestational diabetes and the test result
showed that she has elevated blood glucose levels. Martin has had type 1 diabetes since age 4. He monitors his blood glucose level several times a day and takes insulin to manage his blood sugar. Martin has always been a healthy weight, but does not exercise regularly. His dietary habits also need to be improved to help improve nutrient content and manage blood glucose levels. Tamara and Martin are concerned for their family's health and want to do all they can to reduce the risk of diabetes and associated health problems. Now that Tamara is pregnant, what should she do for exercise to reduce her risk of gestational diabetes? A) She should stop exercising because she is pregnant and focus on improving her diet B) She should only do light daily activity and no vigorous activity or strength training C) She should focus on daily high-intensity aerobic activity D) She should continue her current level of aerobic activity and strength training