Such functions include blood pressure, body temperature, respiration rate, and blood glucose (sugar) levels. The normal range of values for any one of these functions is called a set point. Homeostasis insures that vital functions remain close to their set point in spite of any changes in external conditions. For instance, suppose that a child leaves a warm house to go out-side to play when the temperature is 32Â°F (0Â°C).
Unit radian is used to denote measurement of angle. Basically, one radian is angle subtended by an arc of unit length that is intercepted on a circle of radius one. Angle which is made by interception of arc of a unit radius circle is referred as unit radian.
Medical Definition of circadian. : being, having, characterized by, or occurring in approximately 24-hour periods or cycles (as of biological activity or function) circadian periodicity circadian rhythms in behavior or physiological activityâcompare infradian, ultradian.