While it is almost impossible to list every discipline, some common STEM areas include: aerospace engineering, astrophysics, astronomy, biochemistry, biomechanics, chemical engineering, chemistry, civil engineering, computer science, mathematical biology, nanotechnology, neurobiology, nuclear physics, physics, and robotics, among many, many others.
Presynaptic neurons are the neurons that conduct the AP to release a neurotransmitter and they affect the postsynaptic neurons. What ALWAYS causes a neuron to release any neurotransmitter (whether it is excitatory or inhibitory) is an action potential.ontrast that with exitatory NTs: All excitatory neurotransmitters cause an opening of ligand-gated sodium ion channels. The inhibitory NT could also cause an opening up of ligand-gated Chloride Ion channels.
Glutamate. Glutamate is the most abundant excitatory neurotransmitter in the brain and spinal cord. It is released, for example, by afferent neurons. In many cases, the receptor is a ligand gated ion channel that produces fast postsynaptic potentials.cetylcholine. Acetylcholine is the neurotransmitter released by two types of neurons you hear about frequently in physiology: parasympathetic postganglionic neurons and somatic efferent neurons. In the parasympathetic case, the receptor is a seven transmembrane domain receptor coupled to a trimeric G protein.