Neurobio

There are three ways the hypothalamus responds to sensory signals and maintains homeostasis. Humoral response stimulate or inhibit release of hormones through the pituitary. Visceromotor responses adjust the balance within the autonomic nervous system and the somatic motor response which stimulate behavior through the somatic system. There are many gene techniques to access the brain some of which include; are cre-expressing mouse lines and delivering viruses to anatomically to specific locations. These processes let us artificially manipulate the genes in the brain to see how they express themselves. In addition, we can do tract tracing by delivering engineered genes into the brain. In this way, we can activate neurons and turn them off to see how they affect behavior. We can then analyse the behavior that comes from this modification. Neurobio used to be based on just ecological literature but now we can add both the literature and these experiments to come to a clearer conclusion. Body weight regulation starts with looking at certain genes which are very rare. Mutations of the leptin gene lead to inability to control body weight. Deb gene is a gene that affects body weight. Diabetes is not only a genetic disorder but it is polygenic, multiple genes associated with each other. These genes need external influence to become completely expressed.