Which statement about the effects of nicotine use is true? nicotine has no effect on brain chemistry. nicotine has to be used for years before there are physical effects. nicotine is not a mood enhancer. nicotine is a chemical that alters how an individual feels.

Exercise has no positive effects on the nervous system? true or falseu

Which of the following statements is true about body composition? a. body composition is the percentage of fat to lean body mass. b. body composition is a measure of one's body weight. c. body composition is a measure of one's essential body fat. d. body composition is not a good indicator of overall health. select the best answer from the choices provided. a

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