In the human body, most of the lever systems formed by muscles pulling on bones are what class?
A. 1st class
B. 2nd class
C. 3rd class
D. no particular class is dominant
Answer: C
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Which of the following statements is NOT true about the spleen?
a. The spleen contains a large population of leukocytes. b. The spleen produces new erythrocytes. c. It removes and destroys worn-out red blood cells. d. The spleen is located in the upper left side of the abdomen.
Of the following, the best description of health-related fitness is fitness that enables you to
A. achieve the highest possible level of performance. B. function at your best. C. live a long, full life. D. avoid serious illness.
Compare and contrast the health risks of the following two people: Suki is a 25-year-old recreational runner
She runs for 30 minutes at least 4 days a week and weight trains at a fitness center for 30 minutes 3 days a week. She also makes sure she stretches after her workouts. Marla is a 25-year-old graduate student who does not exercise regularly. She will occasionally take a jog with friends, but is often out of breath and too sore the next day to be motivated to do it regularly. What will be an ideal response?
Explain the ways in which circadian rhythm and homeostatic sleep drive can affect athletic performance. Include physiological factors, such as hormones, that mediate some of these effects.
What will be an ideal response?