The atrioventricular (AV) heart valves open and close . The atrioventricular (AV) heart valves open and close . passively, depending on the pressure of the blood in the atria and ventricles entirely differently from the mechanism used to operate the semilunar valves. as papillary muscles and chordae tentinae pull them as the circular muscles surrounding them operate.

Aclient, prescribed dextroamphetamine for attention deficit hyperactivity disorder (adhd), has developed a common adverse effect of the medication since beginning therapy. which initial intervention should the client be encouraged to implement? a. increase fiber intake. b. take an over-the-counter (otc) laxative daily. c. take metronidazole. d. take diphenoxylate hydrochloride.