Betaine is a byproduct of sugar beet processing. Betaine works by preventing the build-up of an amino acid called homocysteine.This amino acid can harm blood vessels and contribute to heart disease, stroke, or circulation problems.etaine is not a cure for homocysteinuria. Betaine may also be used for purposes not listed in this medication guide. Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.
A smooth muscle is excited by external stimuli, which causes contraction. Each step is further detailed below. Inducing stimuli and factors. Smooth muscle may contract spontaneously (via ionic channel dynamics) or as in the gut special pacemakers cells interstitial cells of Cajal produce rhythmic contractions.
Other structures in the body that contain smooth muscle include the myometrium-the muscular wall of the uterus-which is responsible for the rhythmic contractions of labour; the piloerector muscles, which cause skin hair to stand up; and the irises, which control the diameter of the pupils.unction of smooth muscles depends on the tissues where they are present.... In blood vessels, when the smooth muscles contract, they constrict the lumen of the blood vessels â¦ (arteries) thus increasing the blood pressure, and when they relax, the lumen increases in diameter and thus brings down the blood pressure..