Question

This question is about the resting membrane potential (RMP): 1) describe the role that the passive sodium channels play in the RMP, 2) describe the role that the intracellular anionic proteins play in the RMP, and 3) describe what happens to the RMP when a chemically-gated channel is activated, resulting in the closing of a chloride channel.

Answer 1

1.The role of sodium potassium channel is Sodium-potassium pumps moves 2 potassium ions inside the cell as 3 sodium ions are pumped out to maintain the negatively-charged membrane inside the cell resulting in maintaining the resting potential.This is how sodium potassium pump play in Rmp

2.The main role that the Ion channel proteins play is that they create paths across cell membranes through which the ions can passively diffuse without direct expenditure of the metabolic energy. And they have selectivity for certain ions, thus, there are potassium-, chloride-, and sodium-selective ion channels. Most pumps use metabolic energy (ATP) to function.

3.The process depolarisation happens.Neurons can undergo depolarisation to various stimuli which include heat, chemical, light, electrical or physical stimulus. These stimuli will create a positive potential inside the neurons. When the positive potential becomes greater than the threshold potential, it causes the opening of sodium channels.