During neurology lab, your evil roommate isolated a neuron in a petri dish and m

Question

During neurology lab, your evil roommate isolated a neuron in a petri dish and measured the membrane potential of the cell. As your evil roommate was recording, the membrane potential shifted from -70mV to -60mV. Which of the following could explain this observation?

Question 12 options:

a)

b)

c)

d)

e)

All of the answers are correct.

To understand the resting membrane potential better, you mutate the potassium leak channels and sodium leak channels so that there is more potassium leakage but even less sodium leakage in these cells. What is a likely consequence of these mutations on the nerve cell?

Question 13 options:

a)

b)

c)

d)

e)

a)

Adding Cl- ions to the solution surrounding the cell.

b)

A ligand binding to a ligand-gated Na+ channel that results in an increase in membrane permeability to Na+.

c)

Both "Closing of K+ leak channels. " and "Adding Cl- ions to the solution surrounding the cell. " are corrct.

d)

Closing of K+ leak channels.

e)

All of the answers are correct.

Explanation / Answer

1st question : All of the above are correct ( E )

2nd question : The resting potential will be increased ( become more negative ) beyong the negative -60 to -80 mV . ( A option ) Becaus whenever potassium ion changes , resting potential has to change .

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