INTRODUCTION Serotonin is a monoamine neurotransmitter derived biochemically from L-tryptophan. It is mainly found in the gastrointestinal tract (about 90% in enterochromaffin cells), platelets and in the central nervous system of humans and animals. It is an important biogenic amine that play combined role of neurotransmitter as well as neuromodulator (Gyermek, 1996). Serotonin, a neurotransmitter synthesized in the brain, acts importantly in the functioning of the cardiovascular, renal,...
INTRODUCTION 1.1GENERAL BACKGROUND OF THE SUBJECT MATTER In our society, the state of the environment influences the inhabitants because environment is one of the key determinants of the optimal health or well being. It includes the living and non living things that man have to interact with and which can influence his state of health. A characteristics which has set man apart from other species has ability to control many aspect of his environment throughout recorded history, people con...