Which one of the following individuals should consult a physician before beginning an exercise program?
a. a person aged 30 or older
b. a person with a low body mass index
c. a person who is diabetic
d. a person who already performs more than 150 weekly hours of physical activity

Which one of the following individuals should consult a physician before beginning an exercise program?
 
C. A person who is diabetic

20 times a minute is usually the average respritory rate of an adult. additionally the patient is breathing on his own, is clearly maintaining his airway, and is intaking a sufficient amount of air. you shouldn't use a bag valve mask, cpap, or other form of positive pressure ventilation, unless the patient has lost control of his airway, and is not breathing (apneic) or has rapid breathing or slow and shallow respirations. this patient would most likely and should be put on an non-rebreather mask or nrb attached to 100% high flow oxygen at 15 l/min. don't use a nasal cannula, as the amount of oxygen it provides is limited with a rate of 6 l/min.

Answer. av valves opens;