Suppose that a cow is launched into space, far from the Sun, wearing a suit that provides it with oxygen but very little insulation. Estimate how long it will take the cow to radiate enough heat to lower its body temperature by 2C , wherein hypothermia will begin to set in. (Note: You will have to estimate whatever numerical parameters that you think are relevant to this problem; there is a wide range of “correct answers”.)

Suppose that a cow is launched into space, far from the Sun, wearing a suit that provides it with oxygen but very little insulation. Estimate how long it will take the cow to radiate enough heat to lower its body temperature by 2C , wherein hypothermia will begin to set in. (Note: You will have to estimate whatever numerical parameters that you think are relevant to this problem; there is a wide range of “correct answers”.)

Ebk:Nutrition & Diet Therapy

10th Edition

ISBN:9780357391747

Author:DEBRUYNE

Publisher:DEBRUYNE

Chapter6: Metabolism, Energy Balance, And Body Composition

Section: Chapter Questions

Problem 1CA

See similar textbooks

Similar questions

(a) Write down an equation expressing the thermal balance between the human bodyand its environment.(b) Under what conditions is the temperature of the deep tissues of the human bodygoing to change? Discuss the physiological mechanisms which the body employs to adjustsuch an imbalance. How can the air conditioning engineer, through an appropriate manipulationof the environment, assist the body in feeling comfortable?
At what human body temperature can hypothermia set in?
An animal living in a cold environment loses heat at a rate that is proportional to its surface area, but its metabolism generates heat in all of its cells, so the rate of heat generation is proportional to its volume. All other factors being equal (which they often are not!), which implications would follow from these facts? Choose all correct responses. Because it is smaller, a baby seal is more at risk for hypothermia (body temperature falling to too low a value) than is an adult when it is in an ocean significantly colder than its body temperature. If you take a baby outdoors on a cold day, you should dress it more warmly than you would dress yourself because it is smaller. If you take a baby outdoors on a cold day, you should dress it less warmly than you would dress yourself because it is smaller. If you take a baby outdoors on a cold day, how cold it feels to you is a good measure of how warmly you should dress that baby. Because it is smaller, a baby seal is less at…
Using a specific evidence of thermoregulation to support the statement that “The importance of the effect of temperature on physiological function is revealed by adaptations to maintain function at different temperatures”. How exactly is thermoregulation involved as an adaptation?
Claude Bernard, a nineteenth-century French physiologist often considered the father of modern animal physiology, is still remembered today for his famous dictum: “Constancy of the internal environment is the condition for free life.” Does the study of thermal relations lend support to his dictum? Explain.
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?
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 same
By the way, if the average body density is 62 lbs/ft3, what does it mean (in terms of fat vs. muscle) if your body density is less than 62 lbs/ft3? What if it is more than 62 lbs/ft3?
If daytime body temperature of some ectotherms were measured, the values would be fairly constant. Provide an explanation for such observations, giving some possible mechanisms that might be involved
Using the set of data that follows, calculate how many of themolecules of O2 that were used in aerobic catabolism by JuliusCaesar are in each liter of atmospheric air today. All valuesgiven are expressed at Standard Conditions of Temperature andPressure (see Appendix C) and therefore can be legitimatelycompared. Average rate of O2 consumption of a human maleduring ordinary daily activities: 25 L/h. Number of years afterhis birth when Caesar was mortally stabbed near the RomanForum: 56 years. Number of liters of O2 per mole: 22.4 L/mol.Number of moles of O2 in Earth’s atmosphere: 3.7 × 1019 mol.Number of molecules per mole: 6 × 1023 molecules/mol. Amountof O2 per liter of air at sea level (20°C): 195 mL/L. Be prepared tobe surprised! Of course, criticize the calculations if you feel theydeserve criticism.
The thermoneutral zone is the range of body temperatures over which an animal can maintain a constant basal metabolic rate. Which of the following patterns about thermoregulation is true? A. Below the lower critical threshold, animals must decrease their metabolic rate in order to maintain body temperature B. Animals living in the arctic have higher critical temperatures than do animals in the tropics C. When outside temperatures are below the lower critical temperature for an animal, animals in the arctic increase their metabolic rate faster than do animals in the tropics D. All of the above E. None of the above
Write a question appropriate for this study guide about the heat energy added to 1683 grams ofany biological substance whose specific heat capacity is given in the OpenStax College Physicstextbook, if its temperature changes by 0.018 degrees Celsius. Then answer it.