KINE 2490 Chapter Notes - Chapter 25: Radiant Energy, Heat Illness, Artificial Turf
30 Aug 2016
School
Department
Course
Professor
Document Summary
Controlled primarily by hypothalamus (region of the diencephalon forming the floor of the 3rd ventricle of the brain). Gland that maintains homeostasis: initiates cooling or heat retention mechanisms to achieve a relatively constant body core (skull, thoracic, and abdominal area) temp. (36. 1 37. 8 c) Heat-regulating mechanisms: perspiring or shivering; activated by: stimulation of peripheral thermal receptors in the skin, changes in blood temp as it flows through the hypothalamus. Body gains heat from external sources (environmental temperatures) or internal processes. Majority of internal heat = muscle activity through energy metabolism. At rest and 30. 6 c air temp = 2/3 heat loss due to conduction, convection, and radiation: higher air temp = evaporation is predominant for heat loss. The loss of heat from a warmer object to a cooler object in the form of infrared waves w/o physical contact. Usually body temp is warmer than environment = radiant heat dissipated through the air to surrounding cooler objects.
