conduction system

Question 1

Pacemaker cells of sinoatrial node (S.A.) are _ due to spontaneous _ attributed to leaky Na+ channels

Answer 1

auto-rhythmic
depolarization

Question 2

The pathway for electrical conduction over the heart works due to _ _.

Answer 2

gap junctions

Question 3

Most of pathway except for atrial and ventricular muscle is ___ only.

Answer 3

electrical

Question 4

_____→ atrioventricular node (AV node) →AV bundle (Bundle of His) → Purkinje fibers

Answer 4

SA Node

Question 5

S.A. node → __→AV bundle (Bundle of His) → Purkinje fibers

Answer 5

AV Node

Question 6

S.A. node → atrioventricular node (AV node) →__ → Purkinje fibers

Answer 6

AV bundle (Bundle of His)

Question 7

rt and left bundle branches into the ___

Answer 7

interventricular septum

Question 8

After the interventricular septum the electrical signal travels to the __ _ and up the walls of ventricles.

Answer 8

Purkinje Fibers

Question 9

Contraction of atria and ventricles can only occur once myocyte has
depolarized. So what is the order of chamber contraction?

Answer 9

atria 1st, ventricles 2nd