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
5.2.1 Structure and Function of the Synapse. 1  An action pulse reaches the terminal endings of the presynaptic cell. 2  A neurotransmitter is released, which diffuses across the synaptic gap to bind to receptors in specialized membranes of the postsynaptic cell. Development of a receptor voltage, which is the graded response of the receptor to the stimulus. 2  It is the initial electric event in the receptor. 3  Subsequent buildup of a generator voltage, which is the electric phenomenon that triggers impulse propagation in the axon.