Answer: This is due to inhibitory postsynaptic potential.
Explanation: Inhbitory postsynaptic pontential causes less or no action potential, due to that target nueron recieves negative signals from the transmitter or it has no receptors that can respond to that particular nuerotransmitter as there are many nuerotransmitters varying in sizes and shapes with specificity. Meaning a different nuerotransmitter will generate an electrical impulse to a certain kind of nueron causing an inhibitory/excited response which in this case the response was inhibitory.
The endoplasmic reticulum can either be smooth or rough, and in general its function is to produce proteins for the rest of the cell to function. The rough endoplasmic reticulum has on it ribosomes, which are small, round organelles whose function it is to make those proteins.
