Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Physiology: Week 7
Chapter 19
| Question | Answer |
|---|---|
| What are the 3 structures of the synapse? | -Synaptic knob -Synaptic cleft -Plasma membrane of postsynaptic neuron |
| A "nerve impulse" is also known as an: | action potential |
| Which part of an action potential includes the opening of the voltage gated Na+ channels? | Depolarization |
| Closure of the Na+ channel and opening of the K+ channels happens in which step of the action potential? | Repolarization |
| What is the all-or-none principle of an action potential? | once an action potential is triggered by a stimulus that reaches the threshold potential, it will proceed at full magnitude regardless of the strength of the stimulus |
| Graded potentials can be _______________ or ____________________ | excitatory (depolarizing) or inhibitory (hyperpolarizing) |
| What are the 3 main phases of an action potential? | depolarization, repolarization, and hyperpolarization |
| What happens during hyperpolarization? | outflow of K+ ions, causes membrane potential to become more negative than resting state |
| When Na+ ions flood into the cell, what happens? | the interior of the neuron becomes less negative |
| In which phase is the membrane potential brought back to its resting state? | Repolarization |
Created by:
sydneepk