APK 3120 Exam 4 Questions & Answers 2024/2025
Body temperature regulation - ANSWERSStress of physical exertion complicated by environmental thermal conditions
Homeothermic - ANSWERSinternal body temperature regulated, nearly constant despite environmental temperature changes
Thermoregula...
Body temperature regulation - ANSWERSStress of physical exertion complicated by environmental
thermal conditions
Homeothermic - ANSWERSinternal body temperature regulated, nearly constant despite environmental
temperature changes
Thermoregulation - ANSWERSregulation of body temperature around a physiological set point
Acclimation - ANSWERSshort-term adaptation to environmental stressor (days/weeks)
Acclimatization - ANSWERSlong-term adaptation to environmental stressor (months/years)
Transfer of heat between body and environment - ANSWERS-Heat moves from body core to body shell
via blood
-When heat reaches skin, can be dissipated by conduction, convection, radiation, or evaporation
Conduction - ANSWERSthe transfer of heat from one solid material to another though direct molecular
contact
Radiation - ANSWERSHeat loss in form infrared rays
Convection - ANSWERSmoving heat from one place to another by the motion of gas or liquid across a
heated surface
Evaporation - ANSWERSHeat loss via phase change from liquid to gas
, Preoptic-anterior hypothalamus (POAH) - ANSWERSBody's thermostat located in the brain
Receives input from sensory thermoreceptors
When body temperature deviates, POAH activates thermoregulatory mechanisms
peripheral thermoreceptors - ANSWERSlocated in the skin
central thermoreceptors - ANSWERSlocated in the brain and spinal cord
Core body temperature - ANSWERShighest
Skin Temperature - ANSWERSLowest
Heat Strain Assessment - ANSWERS-Internal Body Temperature
-Skin Temperature
-Heart Rate
-Body Weight
Acute Physical Changes to Heat Strain - ANSWERS-Increased Heart Rate
-Vasodilation
-Increased sweat production
-Increased release of ADH and aldosterone
-Increased reliance on carbohydrate for energy
Acute Altitude: Pulmonary and Blood Adaptations - ANSWERS-Increased resting ventilation
-Increased submaximal exercise ventilation rate
-Pulmonary diffusion well maintained
Altitude: Muscle and Cardiovascular Adaptations - ANSWERS-Decrease in muscle fiber CSA
-Reduced mitochondrial and glycolytic enzyme activities
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