Tumor markers are:

At a health fair, a patient informs you that she has just been prescribed a metered-dose inhaler (MDI) for her asthma. She states that she is confused about how to take the medication when needed. Which one of the following statements about the MDI would be most appropriate for you to make?

A) "Take it every 4 hours around the clock, even if you feel fine." B) "Make sure to store the metered-dose inhaler in your refrigerator." C) "You should only take the medication after calling your doctor." D) "It is important to shake the inhaler vigorously before taking the medication."

A 4-year-old boy who primarily eats grilled cheese sandwiches and tomato soup can suffer from iron-deficiency anemia because of:

a. Increased need b. Inadequate intake c. Impaired utilization d. Increased need and inadequate intake