How does regular exercise help make us more alert and energetic? A. It gets our hearts beating faster and gives us a rush of energy. B. Exercise increases our endurance and therefore we feel less tired. C. During exercise the brain releases endorphins, the chemicals that help improve our mood.

Whats the difference between epinephrine and norepinephrine?

Why do farmer's kill animals in a mean way, don't farmer's have feeling's?

In a study of a weight loss program, 40 subjects lost a mean of 3.0 lb after 12 months. does the weight loss program have practical significance? a. yes, because the weight loss program worked and the subjects lost a mean of 3.0 lb. b. no, because the mean weight loss of 3.0 lb after one year does not seem to justify the program. c. no, because the sample of 40 subjects was too small to determine if the program was useful. d. yes, because the mean weight loss of 3.0 lb after one year does seems to justify the program.