EDKP 395 Lecture Notes - Lecture 30: Exercise Intensity, Vasodilation, Hypothermia
1 Dec 2016
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Document Summary
To maintain homeostasis during exercise = regulation of 4 key physiological variables. Regulated in narrow limits by physiological control of. Blood flow [to skin] / hormone secretion / metabolic rate [cold stress-shiver] Normal core body temp = 37 1 c (98. 6 1. 8 f) 1- increase in body tempo >39. 5oc = hyperthermia. 2- decrease in body tempo <35oc = hypothermia *mild at (cid:1007)(cid:1009) c. Slowed metabolism / cardiac arrhythmias / loss of consciousness / Contributing factors to heat gain & heat loss to regulate core temperature at ~37 c. Body = heat sink *need balance between heat outflow = heat inflow. T = inflow heat gain > outflow t = outflow heat loss > inflow. Contributing factors to heat gain & heat loss to regulate core t at 37 c: change in heat gain. High bmr = lose heat & low bmr = keep heat. 3- hormones * catecholamines norepi/epine/thyroid hormone bmr = lose heat & weight.
