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- Thermoregulation is a process used to maintain body temperature within an optimum range. Describe how the human body maintains body temperature in both hot and cold weather ensuring you explain the mechanisms that are involved.He reasons that a liter (about a quart) of water weighs 1000 g, whichis equivalent to 580,000 cal, or 580 kcal, of heat when lost as sweat.Therefore, instead of reducing his diet by 580 kcal/day, he believesthat losing a liter of sweat every day in the sauna will cause him tolose about a pound of fat a week. Will this approach work? Explain.Why is heat production a good way to measure the body’s metabolic rate?
- 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…In which of the following processes is the amount of heat involved the highest? A. completely freezing one kilogram of water B. completely evaporating one kilogram of ice C. completely evaporating one kilogram of water D. completely melting one kilogram of iceThe uncoupling of photon movements results in thermoregulation. Explain and define the terms Brown fat and non shivering thermogenesis as to the production of heat in babies.
- It is important for the body to be able to cool itself even during moderate exercise. Suppose a 70kg man runs on a treadmill for 30min and at a (total) metabolic energy expenditure rate of 1000W remembering that the human body has a 25% efficiency. Suppose also that the man cannot perspire; and cannot lose any heat viaconduction, convection, and radiation. By how much would the man’s body temperature increase at the end of the 30min exercise? Express your answer in oC. A)8.8B)1.4C)0.5D)3.1E)5.7Why the human body is a heat engine which is more more or less 20%efficient?The heat you feel on your chair when you stand up was transferred from your skin via ________. conduction convection radiation evaporation
- Why does dry heat require more time and higher temperatures than moist heat?What is thermoregulation and why is it necessary for the human body to function properly? List two physiological responses the human body takes to when its core temperature gets too high. Briefly explain how each works to reduce core temperature. Explain why one of these responses will not work if the air temperature is extremely high. Explain why one of these responses will not work if the relative humidity is extremely high.Given that humans thermoregulate, explain why your skin is coolerthan your body core.