PHED-3126EL Lecture Notes - Lecture 15: Hyperthermia, Stroke Volume, Cardiac Output
Document Summary
Chapter 15 factors affecting physiologic function: the environment and special aids to. Explain the statement: hypothalamus plays the most important role in regulating thermal balance. Name four physical factors that contribute to heat exchange during rest and physical activity. Describe how circulatory system serves as a workhorse for thermoregulation. List three desirable clothing characteristics during physical effort in cold and warm weather. Describe how cardiac output, heart rate, and stroke volume respond during submaximal and maximal physical activity during environmental heat stress. Describe circulatory adjustments that maintain blood pressure during hot weather physical activity. Quantify fluid loss during physical activity in hot weather. Explain how acclimatization, training, age, gender, and body fat modify heat tolerance during physical activity. Identify three factors that comprise the heat-stress index. Describe four physiologic adjustments to cold stress. Outline the effects of increasingly higher altitudes on oxygen"s partial pressure in ambient air, hemoglobin saturation with oxygen in pulmonary capillaries, and vo2max.