Shivering is an involuntary response to lowered body temperature. What is the efficiency of the body when shivering, and is this a desirable value?
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Shivering is an involuntary response to lowered body temperature. What is the efficiency of the body when shivering, and is this a desirable value?
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- Heat exchange with the environment depends on the surface area-to-volume ratio of the body. Assuming that the body shape of an animal is at least somewhat spherical, a considerable decrease in body size would _______ the surface area-to-volume ratio, and the ability to exchange heat with the environment would _______. A. increase; increase B. increase; stay about the same C. increase; decrease D. decrease; increase E. decrease; stay about the sameWhen body temperature becomes elevated, two things happen in the skin to help cool the body. Identify these two processes and how they help decrease body temperature.What is the primary advantage of maintaining a constant high body temperature?
- Body temperature is homeostatically regulated around a set point. Given your knowledge of negative feedback and homeostatic control systems, predict whether narrowing or widening of the blood vessels of the skin will occur when a person exercises strenuously?Calculate the amount of evaporation that must occur to remove 400 kcal of heat from the body.When a body temperature is too low. What is the control center?
- How is metabolic rate affected by running speed and body size?During the course of a 24-hour period, at what time(s) is a human's body temperature greatest? During the course of a 24-hour period, at what time (s) is human's body temperature least? What theoremo did you use?Which of the following would increase the rate of heatexchange between an animal and its environment?(A) feathers or fur(B) vasoconstriction(C) wind blowing across the body surface(D) countercurrent heat exchanger
- What effect would swimming in cool water have on body temperatureregulation? What would happen if a negative-feedback mechanismdid not return the value of a variable, such as body temperature, to itsnormal range?Describe the steps in the homeostatic feedback system activated to ensure normal body temperature is maintained when exposed to a hot external temperature (e.g., 42 degrees Celsius). Give typing answer with explanation and conclusionWhat happens when the body is stressed or increases activity? How do these systems react with exertion?