Sudden (acute) colitis. If your dog suddenly develops colitis, it is probably induced by stress, such as boarding, moving, severe weather or some other change in lifestyle, or it could be from a dietary indiscretion, such as emptying the garbage can, too many treats or a sudden change in diet.
âVitamin D is needed for the production of brain chemicals such as dopamine and norepinephrine and acetylcholine. These brain chemicals are known to improve and increase attention span, and its concentration in the brain is directly correlated with the ability to focus for sustained periods of time.â.
Norepinephrine is synthesized and released by the central nervous system and also by a division of the autonomic nervous system called the sympathetic nervous system.ympathetic activation of the adrenal glands causes the part called the adrenal medulla to release norepinephrine into the bloodstream, from which, functioning as a hormone, it gains further access to a wide variety of tissues.