Which of the following would be an appropriate position for examination of the abdomen while the patient is undergoing a physical exam?

A drug that blocked cholinergic receptors in the parasympathetic system could cause:

a. Pupil dilation b. Pupil constriction

After the impulse flows through the ________, the ventricles contract and the SA node starts the flow of a new impulse. 

Fill in the blank(s) with the appropriate word(s).