Control And Regulation Of Cardiac Cycle Flashcards
1
Q
Location and role of SA node
A
Situated in upper wall of right atrium
Sets heart rhythm- pacemaker
Ensures atria contract in time
2
Q
Location and role of Av node
A
Located at bottom right of heart
Responsible for relying electrical impulses
Delay allows blood to empty out of atria into ventricles
3
Q
What are purkyne fibres?
A
Rapidly transmit impulses from AV node to ventricles
4
Q
What is an ECG?
A
Shows speed of electrical signals from SA node to atria, AV node and ventricles.
Normal ECG has 5 waves
5
Q
Systole
A
Heart contracts
6
Q
Diastole
A
Heart relaxes
7
Q
Cardiac cycle bpm
A
60-80 bpm
