What type of ion channel is responsible for the depolarization phase of an action potential?

The type of ion channels responsible for the depolarization phase of an action potential are Na+ (sodium) channels. Sodium ions flow inward through the sodium channels and cause an increase in the concentration of positively charged ions in the cell; this in turn, leads to depolarization.

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101