When an individual has allergies it causes excess mucus to be produced in the nasal passages and sinus cavities. This excess of mucus cannot drain correctly and effectively out the nasal passages at times and as a result, the mucus containing foreign particles flows down the back of the throat, causing post nasal drip.
They transmit signals across a chemical synapse, such as in 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 other synapses.
Definition of a Neurotransmitter. Neurotransmitters are types of hormones in the brain that transmit information from one. neuron to another. They are made by amino acids. Neurotransmitters control major. body functions including movement, emotional response, and the physical ability to. experience pleasure and pain.