Why is it important not to misuse or overuse antibiotics?

What system have glands found throughout the body that release hormones into the bloodstream

True or false mucous membranes destroy pathogens on the outer body surface, at body openings.

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.