Factor which influence
Quiz yourself by guessing what should be in
each of the black rectangles below before clicking
on it to display the answer.
Help
| Question |
 |
|
| Answer |
|
|
| What 2 factors influence Resting Potential? |
Ionic Concentration, Ionic Permeability |
| What are 2 ways Ionic Concentration can be changed? |
1. changing Voltage 2. changing Electrochemical Equilibrium |
| What factor allows for greater permeability of Ions through a mambrane? |
open Gates |
| What is the definition of AP? |
a brief Depolarization, followed by a quick Repolarization = Electrical Impulse |
| What causes AP Depolarization? |
influx of Na+ (in) |
| What causes AP Repolarization? |
efflux of K+ (out) |
| What structure maintains the Resting Potential? |
Na/K Exchange Pump - requires ATP |
| What is the ratio for Active Transport to maintain Resting Potential? |
3 Na+ OUT for every 2 K+ IN |
| What structure maintains the Resting Potential? |
Na/K Exchange Pump |
| Why is the Exchange Pump necessry? |
Na+ and K+ moving across membrane changes voltage - pump REGULATES charge |
| Whenever Na+ and K+ move across the membrane what happens to the membrane? |
concentration gradient is reduced becoming Depolarized |
| What would be the result if the membrane never returned to RP? |
no RP --> no ATP --> no Na/K Pump --> No AP sensory/motor --> death |
| What would be the result of an increase in Diffusional Force? |
^ DF --> ^ Equilibrium Potential ^ Resting Potential |
|
