Conduction Flashcards
1
Q
Where does conduction begin?
A
SA node (Pacemaker)
2
Q
What speeds or slows this rate?
A
Slows - Vagus
Speeds - Cardiac nerves
3
Q
What is the process of pacemaker cell depolarisation?
A
- 4 - Permeable to Na so move in to -40. These are never really resting so called funny channels
- 0 - this change opens VGCC so Ca comes in and causes depolarisation
- 3 - At 10mv these clse and VGKC open and this flow in to lower it again
4
Q
Pacemaker cell depolarisation on a graph
A
5
Q
What is the process of normal myocyte cell depolarisation?
A
4 - Resting. K open so it leaves
0 - Depolarisation and VGNC open so it rushes in
1 - VGNC close and VGKN open so K rushes in to lower potential
2 - VGCC open to slow fall
4 - VGCC close to fall goes again until these close and it starts again
6
Q
Myocyte depolarisation in graph form
A
