What is the function of neurotransmitter

They transmit signals across a chemical synapse, such as a neuromuscular junction, from one neuron (nerve cell) to another "target" neuron, muscle cell, or gland cell.Neurotransmitters are released from synaptic vesicles in synapses into the synaptic cleft, where they are received by receptors on the target cells.

True to the fact it is actually false

C. gemstones they are the only non metallic mineral from the list.