Threshold Questions 1Why did the increase in K outside the n

Threshold Questions:

1.Why did the increase in K+ outside the neuron affect the diffusion of K+ out of the neuron?

2.Why didn’t increase the Na+ levels alter the membrane potential in the resting neuron?

3.The axon membrane is permeable to sodium and potassium. Discuss the flow of ions based on the concentrations of each ion.

Solution

1. The increase is k+ outside neuron affects the diffusion of K+ out of the neuron in such a way that If the extracellular K+ increases then it means that the overall concentration of intracellular K+ will decrease as they are inversely proportional.This leads to a decrease in the steepness of the concentration gradient It further results in less number of K+ ions which will be drawn out//