Quiz 8

Question 1

What is the normal electrical pathway of the cardiac conduction system?

a) Atrioventricular Node →Bundle of His → Purkinje Fibers → Sinoatrial Node

b) Bundle of His → Purkinje Fibers → Sinoatrial Node → Atrioventricular Node

c) Sinoatrial Node → Atrioventricular Node → Bundle of His → Purkinje Fibers

d) Sinoatrial Node → Atrioventricular Node → Purkinje Fibers → Bundle of His

Answer 1

A

Question 2

The plateau phase (Phase 2) of the cardiac action potential is due to which ions channels opening?

a) Calcium

b) Magnesium

c) Potassium

d) Sodium

Answer 2

A

Question 3

Calcium channel blockers are in which Vaugh-Williams classification for antiarrhythmic medications?

a) Class I

b) Class II

c) Class III

d) Class IV

Answer 3

D

Question 4

Which medication can cause photophobia making the dental light painful?

a) Amlodipine (Norvasc)

b) Digoxin (Lanoxin)

c) DOBUTamine (Dobutrex)

d) Verapamil (Calan SR)

Answer 4

B

Question 5

Which medication works by inhibiting the phosphodiesterase-3 enzyme thereby increasing intracellular cAMP resulting in increased contractility?

a) Atenolol (Tenormin)

b) Digoxin (Lanoxin)

c) Milrinone (Primacor)

d) Ranolazine (Ranexa)

Answer 5

C