Regulation of Body Temperature PDF

Regulation of body temperature Dr. Noha Osama  Objectives 1. Recognizing normal body temperature range. 2. Discuss mechanism of body temperature regulation and factors affecting it. 3. Recognizing body temperature as a vital sign and discuss importance of its measure...

Regulation of body temperature Dr. Noha Osama  Objectives 1. Recognizing normal body temperature range. 2. Discuss mechanism of body temperature regulation and factors affecting it. 3. Recognizing body temperature as a vital sign and discuss importance of its measurement. 4. Recognize different body temperature measuring methods. 5. Apply first aid measures in abnormal body temperature. 2  Body temperature ❑Temp. of the external / superficial parts of body i.e., skin ❑It is highest in covered areas of body (skin of head & neck & chest & abdomen) → 34 °C ❑It is lowest in extremities (skin of hands & feets) → 28 °C + - 4 5 6  Heat balance Heat loss Heat gain Heat transfer mechanisms:. 1. Irradiation. Shivering (muscle activity). 2. Conduction. Sympathetic stimulation. 3. Convection. Food (Protein intake). 4. Evaporation (sweating). Thyroid hormone increase Increase metabolism 7 8 9 Thermoregulation and Homeostasis Faculty of Physiotherapy 10  Temperature regulating centers Heat loss center Heat gain center Site: Anterior Site: Posterior Hypothalamus Hypothalamus Function: It detects variation of body temperature from the set point, and it discharges impulses to the effector organs to modify rate of heat production. Set point: It is a standard critical temperature (= 37°C). Heat Exchange in the Skin Faculty of Physiotherapy 13 Clinical application Faculty of Physiotherapy 14 Bair hugger 17 18 Faculty of Physiotherapy 19  What best defines radiation? a. Transfer of heat from hot object to another through water b. Transfer of heat from cold object to hot through air c. Transfer of heat from hot to cold object through air Faculty of Physiotherapy 20  What best defines radiation? a. Transfer of heat from hot object to another through water b. Transfer of heat from cold object to hot through air c. Transfer of heat from hot to cold object through air Faculty of Physiotherapy 21  Which of the following occurs in case of increase body temperature? a. Vasconstriction of skin blood vessels b. Vasodialtation of skin blood vessels c. Increase thyroxine hormone d. Shivering of skeletal muscles Faculty of Physiotherapy 22  Which of the following occurs in case of increase body temperature? a. Vasconstriction of skin blood vessels b. Vasodialtation of skin blood vessels c. Increase thyroxine hormone d. Shivering of skeletal muscles Faculty of Physiotherapy 23 Which of the following is a heat loss centre in the brain? a. Anterior hypothalamus b. Posterior hypothalamus c. Cereberal cortex d. Mid brain Faculty of Physiotherapy 24 Which of the following is a heat loss centre in the brain? a. Anterior hypothalamus b. Posterior hypothalamus c. Cereberal cortex d. Mid brain Faculty of Physiotherapy 25 Faculty of Physiotherapy 26