Loss of response of targets to insulin rather than lack of insulin causes this type of diabetes. Diabetes causes impairment in the functioning of the eyes, circulatory system, nervous system, and failure of the kidneys. Treatments involve daily injections of insulin, monitoring of blood glucose levels and a controlled diet. They cause neighboring cells to produce antiviral proteins. Once activated, these proteins destroy the virus.
Prostaglandins are fatty acids that behave in many ways like hormones.
They are produced by most cells in the body and act on neighboring cells. Pheromones are chemical signals that travel between organisms rather than between cells within an organism. Pheromones are used to mark territory, signal prospective mates, and communicate. Cycles involve hibernation, mating behavior, body temperature and many other physiological processes. Many hormones, such as ACTH-cortisol, TSH, and GH show circadian rhythms.