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PTAdynamo
Nerve Conduction
| Question | Answer |
|---|---|
| What two ions are involved in the sodium potassium pump? | 3 sodium ions(Na+)and 2 potassium ions (K+) |
| What is unsed by the ANS to produce the FIght or flight response to stress? | Norepinephrine |
| Dopamine is involved with what disease process and what does if do? | Parkinsons, motor activity, motivation, congnition |
| What neurotansmitter in a inhibitory transmitter? | GABA, inhibitory, influences interneurons within the spinal cord |
| What neurotransmitter is an excitatory transmitter? | Glutamate, is excitatory, facilitates neuronal change during development |
| What are some Neurotransmitters? | Acetylholine, Glutamate, GABA, Dopamine, and Norepinephrine |
| Acetylcholine works with LMN to do what? | To stimulate mm contraction and regulates HR other ANS functions |
| 3 Na+ from inside cell bind to transport protein, then a phosphate group is transferred from ATP to transport protein releasing Na+ ions to where? | OUTSIDE the cell + |
| 2 K+ from outside the cell bind to a transport ion and are released to where? | INSIDE - Active transport |
| When the overall change is 3 out 2 what is the restin cell going to be? | Negative |
| At resting potential what is more inside the cell? | Na+ |
| At resting potential what is more outside the cell? | K+ |
| Depolarization when poet synaptic neuron receives a stimulus from the presynaptic neuron. What happens to receptors and neuro transmitters? | Receptors catch neurotransmitters which open gated Na+ channels. Na+ rush into the cell causing the inside of the cell to be less neg. |
| Action Potential happens how? | When the stimuls is strong enough to reach the axon hillock |
| What happens to the cell with AP? | The outside of the neuron goes from + to - and the inside goes from - to + |
| What does it mean with the all or none principle when it comes to AP? | An AP will either happen or not, no in between |
| Sub threshold stimulus means what? | The stimulus that was introduced was not strong enough and a AP will not occur |
| Repolarization happens when? | When a neuron is trying to return to its normal resting potential. Downward slope slower |
| When K+ continues to leave the cell thru open K+ channels Na+ channels are closed so no Na+ is leaving. This happens when? | Repolarizaiton the downward slope K+ leaves once Na+ is in |
| What is meant by Absolute Refactory Period? | A period of the AP the neuronis less responsive to other stimuli |
| What is it called when a new action potential cannot be stimulated no matter how strong the stimulus is? | Absolute Refractory Period |
| Once membrans potential hits a certain mV all the Na+ gated channels are closed and K+ gated channels are opened what cannot happen? | A new action potential cannot be stimulated |
| During relative refractory period what happens to the membrane? | Causes membrane potential to be even more - than the rest(below the line) |
| When both Na+ and K+ are closed is called? | Relative Refractory Period |
| How can a super threshold accure? | During Relative Refractory Period it takes more stimuli to bring the neuron to threshold. |
Created by:
demiller243
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