Which of the following is the most common symptom of overtraining? a. rapid weight loss b. irritability c. difficulty sleeping d. fatigue

Describe some of the common health conditions associated with air pollution.

Which statement is true about common childhood infectious disease? a. children should always be given antibiotics to treat an infectious illness. b. frequency of infectious illnesses usually increases as children grow older. c. having a minor infectious illness weakens a child's immune system. d. infectious illnesses are usually mild and require no medication.

Organize the stages of tissue repair in the order in which they occur, starting with the first stage at the top.