Blood sugar level In humans, glucose is the primary source of energy, and is critical for normal function, in a number of tissues, particularly the human brain which consumes approximately 60% of blood glucose in fasted, sedentary individuals. Glucose can be transported from the intestines or liver to other tissues in the body via the bloodstream. Cellular glucose uptake is primarily regulated by insulin, a hormone produced in the pancreas. Glucose levels are usually lowest in the morning, before the first meal of the day, and rise after meals for an hour or two by a few millimoles. Blood sugar levels outside the
Self-regulating heater Self-regulating heater A self-regulating heater is an electrical heater which strives to keep a constant temperature regardless of how the ambient conditions changes. It is the material in the heater itself that regulates the temperature. The heater requires no regulating electronics, temperature sensors, overheat protection etc. The temperature the heater will hold is decided when the material and the heater is produced. It can be fine tuned by changing the voltage to the heater. Self-regulating heaters are made from materials with strong Positive temperature coefficient (PTC) characteristics, i.e. the resistivity of the material increases rapidly with increasing temperature. Such materials