Question

"When inhibitory neurotransmitters bind to their receptors in the post-synaptic cell," positively charged ions flow through the ligand-gated ion channel increasing the chance that an action potential can be fired in the post-synaptic cell negatively charged ions flow through the ligand-gated ion channel decreasing the chance that an action potential can be fired in the post-synaptic cell positively charged ions flow through the stress-gated ion channel increasing the chance that an action potential can be fired in the post-synaptic cell synaptic vesicles fuse with the plasma membrane releasing more neurotransmitter no response is typically detected O

Answer 1

Answer: Negatively charged ions flow through the ligand gated ion channels decreasing the chance that an action potential can be fired in the post synaptic cell.

The negatively charged ion is chloride ions (Cl​​-​​​​) which flows through the chloride channel into the cell and hyperpolarizes the cell. As the cell gets hyperpolarized, it becomes difficult for the post synaptic neuron to depolarize quickly. This effect js inevitable as the neurotransmitter is inhibitory in nature. If the post synaptic cells had an increased chance of depolarization, then the neurotransmitter would have been excitatory (hence options a and c are wrong).

Fusion of synaptic vesicles do not happen due to binding of neurotransmitter with its receptor. It happens due to other presynaptic factors (Option d is wrong).