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  3. Which of the following most accurately states the purpose of the passage? It can be inferred from the passage that some mechani

Which of the following most accurately states the purpose of the passage? It can be inferred from the passage that some mechani

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问题 Which of the following most accurately states the purpose of the passage?
It can be inferred from the passage that some mechanisms that regulate internal body temperature, like sweating and panting, can lead to which of the following?
选项 A、A rise in the external body temperature
B、A drop in the body’s internal fluid level
C、A decrease in the osmotic pressure of the blood
D、A decrease in the amount of renal water loss
E、A decrease in the urine’s salt content
答案B
解析 To answer this question, you must use information contained in the passage to draw an inference about the effects of certain regulatory mechanisms in animals. Choice B is the best answer. The passage states that camels conserve internal water by sweating and panting only when they reach very high body temperatures. Since camels conserve internal water by not panting and sweating, it can be inferred that sweating and panting decrease the body’s internal fluid level. Choice A can be eliminate because the passage suggests that a rise in body temperature can result in panting and sweating, not vice versa. Choices C and D can be eliminated because there is no information in the passage to suggest that internal body temperature regulation methods result in a decrease in osmotic pressure of the blood or in the amount of water lost through the kidneys. Choice E is incorrect because the passage mentions the salt content of desert rats’ urine, but does not suggest that the salt content decreases in response to body temperature regulation mechanisms.
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