Approximately how many workers in the U.S. are injured on the job each year?
A) 750,000
B) 2 million
C) 3 million
D) 4 million
Answer: D
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What is the definition of muscular strength?
A) the amount of force a muscle can produce repeatedly over 60 seconds B) the amount of force a muscle can produce with a single maximum effort C) the ability to sustain a given level of muscular tension over time D the ability to move the joints through a full range of motion
Which change to muscle cells causes older adults to lose muscular strength?
A) The cells get smaller in size. B) The cells attach to the nervous system. C) The cells get larger in size. D) The cells increase in number.
The suffix -genic means producing
Indicate whether the statement is true or false
Compared with physically active individuals, sedentary individuals have ________.
A. three times the risk for coronary heart disease B. five times the risk for coronary heart disease C. ten times the risk for coronary heart disease D. twice the risk for coronary heart disease