The body can use glycogen as an energy source when aerobic exercise lasts
a. more than 90 minutes.
b. between 50 and 80 minutes.
c. between 30 and 60 minutes.
d. less than 20 minutes.

Which action is important to a pregnant woman’s health? see a doctor for regular x-rays drink alcohol in small amounts engage in regular physical activity eat a diet rich in seafood

Describe the overall function of the nervous system

Which of the following represents the results of a review of well-controlled studies of vitamin c supplementation on the resistance to, and recovery from, colds? there was a reduction in the duration of colds by 50% on the average. there was a slight effect on reducing the duration and severity of colds for people taking vitamin c supplements. there was a significant reduction in the duration of colds in people who consumed at least one gram a day. there was a significant reduction in the number of colds only in people who consumed > three grams per day.