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10. What is the anaerobic phase of work? How long will it låst? 11. Are humans homeothermic or poikilothermic? 12. What are the main mechanisms of heat loss from the body?

10. What is the anaerobic phase of work? How long will it låst? 11. Are humans homeothermic or poikilothermic? 12. What are the main mechanisms of heat loss from the body?

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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10. What is the anaerobic phase of work? How long will it last? 11. Are humans homeothermic or poikilothermic? 12. What are the main mechanisms of heat loss from the body? 14. When an individual is in water, the convective heat loss term is grea:ty increased. For water immersion, K. - 16.5 kcal/m hr°C. Assuming the BMR of a resting man is 72 kcal/hr, find the water temperature at which the water heat loss is just balanced by the BMR. Assume A. = 1.75 m2 and T, = 34°C. 15. Consider a nude male on a beach in Florida. It is a sunny day so he is receiving radiation from the sun at the rate of 30 kcal/hr. He has an effective body surface area of 0.9 m2, T, = 32°C, and the temperature of his surroundings is 30°C. (a) Find the net energy gained by radiation per hour. (b) If there is a breeze at 4 m/sec, find the energy lost by convection per hour. (c) If he loses 10 kcal/hr by respiration and his metabolic rate is 80 kcal/hr, how much heat is lost by evaporation? 16. Under typical conditions, what percent of the body heat loss is due to respiration? 17. When is counter-current heat exchange involved in controlling the heat loss to the environment? 18. What is a clo?
Transcribed Image Text:10. What is the anaerobic phase of work? How long will it last? 11. Are humans homeothermic or poikilothermic? 12. What are the main mechanisms of heat loss from the body? 14. When an individual is in water, the convective heat loss term is grea:ty increased. For water immersion, K. - 16.5 kcal/m hr°C. Assuming the BMR of a resting man is 72 kcal/hr, find the water temperature at which the water heat loss is just balanced by the BMR. Assume A. = 1.75 m2 and T, = 34°C. 15. Consider a nude male on a beach in Florida. It is a sunny day so he is receiving radiation from the sun at the rate of 30 kcal/hr. He has an effective body surface area of 0.9 m2, T, = 32°C, and the temperature of his surroundings is 30°C. (a) Find the net energy gained by radiation per hour. (b) If there is a breeze at 4 m/sec, find the energy lost by convection per hour. (c) If he loses 10 kcal/hr by respiration and his metabolic rate is 80 kcal/hr, how much heat is lost by evaporation? 16. Under typical conditions, what percent of the body heat loss is due to respiration? 17. When is counter-current heat exchange involved in controlling the heat loss to the environment? 18. What is a clo?
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