Exam 10: Thermal Relations

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Human blood has an osmolarity of about 300 mOsm and shark blood has an osmolarity of about 1000 mOsm. If you collected blood samples from both humans and sharks and attempted to freeze them, which would freeze at a lower temperature?

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Refer to the figure shown. Fish were housed under three different temperature conditions. Their response to acute and chronic temperature changes is plotted on the figure. Refer to the figure shown. Fish were housed under three different temperature conditions. Their response to acute and chronic temperature changes is plotted on the figure.   Which line best represents the chronic response of animals being cooled from 30°C to 10°C? Which line best represents the chronic response of animals being cooled from 30°C to 10°C?

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The optimum temperature of flight muscle of a sphinx moth is _______ and this _______ with decreasing environmental temperature.

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Which group includes only forms of hypothermia?

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Suppose an animal has a metabolic rate of 10 ml O2/h at 20°C. The Q10 is 2.5. What is its metabolic rate at 10°C?

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Antarctic fur seals live in cold water, thermoregulate, and maintain elevated core body temperatures. Manatees, another marine mammal, live in warm water, thermoregulate, and maintain elevated core body temperatures. Based on general principles, one would predict that for Antarctic fur seals, the effect of temperature on enzyme-substrate activity would be similar to that of _______-water fish, and for manatees it would be similar to that of _______-water fish.

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During the onset of a fever, the body's temperature set point _______ and results in the body adjusting to this new set point by _______.

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Birds adjust their insulation via

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Endothermy in insects

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Most commonly, the slope of the line depicting the chronic response of metabolic rate to temperature is _______ the slope of the lines depicting the acute response of metabolic rate to temperature.

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Which statement about an animal's body temperature is true?

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During particularly cold winters

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The reason that most fish species cannot be warm-bodied is

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Based on how the metabolic rates of ectotherms and endotherms respond to temperature, at which temperature would you expect the differences in metabolic rates between ectotherms and endotherms to be largest? (Hint: Think about the response curve of each type of animal to environmental temperature.)

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Suppose an animal has a metabolic rate of 3 ml O2/h at 10°C? The Q10 is 2. What is its metabolic rate at 20°C?

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Compared to a summer acclimatized fox, what is a winter fox's resting metabolic rate when both are placed at -50°C?

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Uncoupling protein 1 is critical for

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Why can warmer winter temperatures have a negative impact on hibernators?

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In a very hot environment, the benefit of hyperthermia is that it

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Refer to the figure shown. Multiple species of poikilotherms that naturally experience different body temperatures are shown in the figure. The response of each species at multiple temperatures is plotted on the figure. Refer to the figure shown. Multiple species of poikilotherms that naturally experience different body temperatures are shown in the figure. The response of each species at multiple temperatures is plotted on the figure.   Which line indicates the species that naturally experiences the narrowest body temperature range? Which line indicates the species that naturally experiences the narrowest body temperature range?

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