We know that the sum of the measures of any triangle is 180 degrees. Using the fact that angle A + angle B + angle C = 180 degrees, we can find the measure of angle C. angle A = 40. angle B = 60. angle C = we don't know.
When a depolarization wave reaches the synaptic end bulb of a presynaptic neuron, the NEXT event is diffusion of calcium ions into the cell A neurotransmitter that allows sodium ions to leak into a postsynaptic neuron causes
Depolarization occurs when the inside of the cell becomes more positive and the membrane potential moves toward threshold. If depolarization is sufficient, threshold is reached and the cell will undergo an action potential. Hyper polarization is the opposite - the inside of the cell becomes more negative and the membrane potential moves away from the threshold; the cell is therefore less likely to undergo an action potential.