cardiovascular system Flashcards
1
Q
True or False. At rest, the inside of the cell is more negatively charged than the outside of the cell
A
True
2
Q
what occurs during the P wave?
A
atrial depolarisation (less negative in comparison to the outside
3
Q
what occurs in the QRS wave complex?
A
ventricular depolarisation. ventricles contract
4
Q
what occurs in the T wave
A
ventricular repolarisation
5
Q
what occurs during diastole
A
the heart is relaxed, blood flows into the heart. The AV valve is open, the semilunar valve is closed.
6
Q
what occurs during systole?
A
the heart is contracting, blood is being pumped out of the heart. the AV valve is closed and the semilunar valve is open.
7
Q
what is the natural pacemaker of the heart?
A
The SA node
8
Q
When does the lub-dub sound occur?
A
when the valves are closed/shut
