There are several preventative measures that will be helpful to get rid of fungus gnats. Since fungus gnats thrive under moist conditions, especially in decaying vegetation and fungi, let potting soil dry out between waterings. Fungus gnats often become a problem in autumn and winter when plants are brought indoors.
A chemical messenger is any compound that serves to transmit a message. A chemical messenger may refer to: 1  Hormone, Long range chemical messenger. 2  Neurotransmitter, communicates to adjacent cells.3  Neuropeptide, a protein sequence which acts as a hormone or neurotransmitter. chemical messenger may refer to: 1  Hormone, Long range chemical messenger. 2  Neurotransmitter, communicates to adjacent cells. 3  Neuropeptide, a protein sequence which acts as a hormone or neurotransmitter.
It depends on how you count, but maybe 30 - 100 different molecule types, with 10 of them doing 99% of the work. In the big scheme of things, there are three main categories of neurotransmitters: Small molecule neurotransmitters (glutamate, GABA, dopamine, serotonin, noradrenaline, acetylcholine, and histamine)