Author Question: Place the five phases of a myocardial action potential in correct order. 1. Fast sodium channels are ... (Read 83 times)

imowrer · **on:** Jul 16, 2018

Place the five phases of a myocardial action potential in correct order. 1. Fast sodium channels are inactivated 2. Cell returns to its resting state 3. Plateau phase 4. Initial rapid depolarization of myocardial tissues 5. Calcium channels close

a. 1, 3, 2, 5, 4
b. 4, 1, 3, 5, 2
c. 1, 2, 3, 4, 5
d. 4, 1, 2, 5, 3

Question 2

Digoxin toxicity may include which of the following manifestations? 1. Hyperkalemia 2. Premature ventricular contractions 3. Bigeminal rhythm 4. Nausea 5. Abdominal pain

a. 2 and 5 only
b. 1, 2, and 3 only
c. 1, 2, 3, 4, and 5
d. 1, 2, 3, and 5 only