In this lecture we're going to describe how 'pacemaker' cells can spontaneously depolarize without anything stimulating them externally.
Some questions you should be able to answer at the end:
1. How can SA and AV node cells depolarize without being externally stimulated?
2. What are ‘funny channels’?
3. What ions flow through the funny channels?
4. Why does a pacemaker cell only have phase 4, 0, and 3?
5. Compare the action potential of a pacemaker myocyte versus and ventricular myocyte.
For more, go to paramedicine.com
The full series:
Part 0 - [ Ссылка ]
Part 1 - [ Ссылка ]
Part 2 - [ Ссылка ]
Part 3 - [ Ссылка ]
Part 4 - [ Ссылка ]
Part 5 - [ Ссылка ]
Part 6 - [ Ссылка ]
Part 7 - [ Ссылка ]
Part 8 - [ Ссылка ]
