| A | B |
|---|
| Neurons | convert other forms of energy into electrical events |
| Nerve cells | are capable of self generation of electrochemical impulses |
| The Nernst equation | describes the relation of diffusion potential to concentration difference |
| The Nernst potential | prevents the net diffusion of an ion in either direction |
| The Goldman equation | Is used to calculate the diffusion potential when the membrane is permeable to several different ions |
| The actual membrane potential at rest = | - 70 to -75 mV. |
| Resting membrane potential of nerves = | - 90 millivolts |
| In Depolarization | Sodium flew to the interior of the axon |
| The cell membrane functions as | an electrical capacitor |
| During the resting state | the conductance for k+ ions is 50 to 100 times as great as it is for Na+ ions |
| Re- establishing sodium and potassium after Action Potentials | is achieved by the action of the Na+ -K+ pump |
| Action potentials propagation | travel in both directions away from the stimulus until the entire membrane has become depolarized |
| All or nothing principle | applies to all normal excitable tissues |
| During refractory periods | a second action potential can not be initiated |
| Saltatory conduction | occurs in myelinated fibers |
| Small nerve fibers | are unmyelinated |
| Conduction velocity is greatest in | large myelinated nerve fibers |
| During the relative refractory period | an impulse can be generated with a stimulus that is higher than normal threshold |
