cardiac impulse

Question 1

myogenic

Answer 1

• contracts and relax on its own accord

- no nervous or hormonal simulation

Question 2

Sino-atrial node

Answer 2

• acts as pacemaker
• located in right atrium wall
• causes atrial systole

Question 3

atrio-ventricular node

Answer 3

• impulse is picked up

- located In the wall of right atrium (base)

Question 4

bundle of His

Answer 4

• impulse conducted through

- from bundle of his to the apex of the ventricles

Question 5

purkinje fibres

Answer 5

impulse travels through fibres to ventricle walls

-causes cardiac muscle of ventricles to contract