Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
8 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
Steps of action potential |
1. Local potential 2. Threshold potential exceeded 3. Depolarization 4. Peak 5. Repolarization 6. Hyperpolarization 7. RMP restored |
|
|
|
Local potential |
-70 mV Stimulation Local potential rises |
|
|
|
Threshold potential exceeded |
Local potential reaches threshold (-55 mV) Opens voltage gated channel Na+ opens quickly K+ opens slowly |
|
|
|
Depolarization |
Na+ enters cell quickly Potential reaches 0mV and Na+ channels begin closing |
|
|
|
Peak |
Reaches peak (+35 mV) |
|
|
|
Repolarization |
K+ channels opens fully |
|
|
|
Hyperpolarization |
K+ channels stay open longer than Na+ channels Voltage drops extra 1 or 2 mV |
|
|
|
RMP restored |
Astrocytes remove extracellular K+ |
|
