Why don’t the terms depolarization and action potential mean the same thing?
What was the effect of increasing the voltage? How does this change correlate to changes in the nerve?
How did the action potential generated with the unheated rod compare to that generated with the heated rod?
Describe the types of stimuli that generated an action potential.
If you were to spend a lot of time studying nerve physiology in the laboratory, what type of stimulus would you use and why?
Why does the addition of sodium chloride elicit an action potential? Hint: Think about the sodium permeability of the neuron (Figure 3.2e).
While the sodium-potassium pump is pumping sodium out of the cell and potassium into the cell, these ions are leaking back where they came from by diffusion. By adding sodium chloride, a more-than-normal amount of sodium will diffuse into the nerve, causing the resting membrane potential to reach the threshold value, bringing about a membrane depolarization.
What was the effect of ether on eliciting an action potential?
Does the addition of ether to the nerve cause any permanent alteration in neural response?
Ok, so you’re using my notecards which is great. I am glad I could help you out cause I wish I had someone to help me out when I took this course. I know Anatomy is super hard.
What was the effect of curare on eliciting an action potential?
Explain the reason for your answer to question 10 above.
What was the effect of lidocaine on eliciting an action potential?
What is the relationship between size of the nerve and conduction velocity?
Keeping your answer to question 13 in mind, how might you draw an analogy between the nerves in the human body and electrical wires?
How does myelination affect nerve conduction velocity? Explain, using your data from Chart 1.
If any of the nerves used were reversed in their placement on the stimulating and recording electrodes, would any differences be seen in conduction velocity? Explain.
No. Once a neural membrane is depolarized and the impulse is being conducted along the neural membrane, which direction is which does not matter. We state that a neural impulse is set up in the neuron’s trigger zone (mainly due to the large number of sodium channels there) but once the depolarization is set up, it not only travels down the axon but also around the soma of the cell.