2 Nerves Cells and Electrical Signaling (pt 2)
Objectives
- Electrical Signaling through Changes in membrane potential
Interactive Activities
Critical Thinking Questions
Learning Summary
- Action Potentials Rapid large depolarization is used for communication.
- All or None Principle A membrane depolarized to threshold or greater the amplitude of the resulting action is the same otherwise no action potential occurs.
- Refractory Period Period of time following action potential of marked decreased excitability.
Two types: absolute and relative - Frequency Coding information about intensity of stimulus.
- Propagation of action potentials upon initiation action potentials propagate the length of axon without decrement.