BIOLOGY 3 Lecture Notes - Lecture 27: Eccrine Sweat Gland, East Los Angeles College, Brown Adipose Tissue
Document Summary
Blood vessels- constrict or dilate surface capillaries. Shivering is basically a bodily function in response to early hypothermia. Shivering can occur in response to fever as a person may feel cold. During fever the hypothalamic set point for temperature is raised. The increased set point causes the body temperature to rise, but also makes the patient feel cold until the new set point is reached. Shivering does more than contract muscles to produce warmth it also activates brown fat to convert chemical energy directly to heat. Elevated internal body temperature (fever) may actually have some benefit in helping the body fight the infection of a virus or pathogenic bacterium. Mitochondria use glucose and its breakdown products to produce energy in the form of atp. In a typical cell the burning of glucose by the mitochondria produces about 52% atp and about 48% heat.
