<prompt> Sweating is not present in:Heat syncopeHeat crampHeat strokeHeat fatigue  <response>: Ans. c. Heat stroke Ref: Reddy 33e p319; Parikh 6e p381Sweating is not present in Heat stroke.Heat stroke hyperpyrexia, sunstroke, systemic hyperthermia: This is attributed to an impaired functioning of the heat regulating mechanism caused by failure of cutaneous circulation and sweating. It is due to prolong exposure to he suns infrared rays, andor to hot atmosphere. Heat stroke Heat hyperpyrexiaSun stroke Thermic FeverHeat cramps Miners cramps Stokers cramp Firemens crampHeat exhaustion Heat collapseHeat syncopeHeat prostration It is due to failure of heat regulating mechanismQ Caused by failure of cutaneous circulation sweatingQ. Occurs due to exposure to heat in open humid environmentQ. All signs of shock are present There is sudden collapse with loss of consciousness. Dry skin, hot flushes with absence of sweatingQ These are painful spasm of voluntary muscles, which follow strenuous work in a hot atmosphere. Caused by toss of water salt in profuse sweatingQ. Collapse without any elevation of body temperature. Occurs due to exposure to high temperature in closed environment Precipitated by muscular exercise unsuitable clothing. There is extreme exhaustion with peripheral vascular collapse with scanty sweatingQ 