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Practice Listening: Multiple Choice, Single Answer ID: #3326 Short Mountains
Instructions ›
Listen to the recording and answer the multiple-choice question by selecting the correct response. Only one response is correct.

Transcript:

Head up to the mountains and if the steep trails don't slow down, the thin air will. There's less oxygen up there so strenuous activity can leave you dizzy out of breath or worse. But even though you're beat, bio chemical processes are already busy at work, acclimating your body. Scientists investigated those pathways in humans and mice. They found that exposure to low oxygen depletes stores of a red blood cell protein it's called the E.E.N.T.1 and that's a good thing because now other substances that protect your body against low oxygen are free to rapidly accumulate and help the body adapt. But here's the kicker. Once the EENT1 protein goes away it doesn't come back meaning red blood cells kind of remember their altitude exposure and that means if you hit the mountains again soon enough you can acclimate faster than you did the first time. The findings are in the journal nature communications.

What are the results and effects of exposure to low oxygen levels?

* Listen to the recording and select the correct answer

Result:

AI explanationShows the answer. Tap to open.
Option 3: "Time taken to acclimatise can be lesser for returning mountaineers"

Explanation: This option is correct as it aligns with the text's assertion that returning mountaineers can acclimatise faster due to the absence of the EENT1 protein, which allows other protective substances to accumulate. This indicates that the time taken to acclimatise can indeed be lesser.

Option 1: "Time taken to acclimatise can be more for returning mountaineers"

Explanation: This option contradicts the text, which states that returning mountaineers can acclimate faster due to the memory of altitude exposure in red blood cells. Therefore, the time taken to acclimatise cannot be more for them.

Option 2: "Time taken to acclimatise is always more for returning mountaineers"

Explanation: This option is incorrect because it presents an absolute statement ('always more') that contradicts the findings in the text. The text indicates that returning mountaineers can acclimatise faster, not slower.

Option 4: "Time taken to acclimatise is always lesser for returning mountaineers"

Explanation: This option is incorrect because it uses the absolute term 'always,' which is not supported by the text. While returning mountaineers can acclimatise faster, it does not guarantee that this will always be the case.

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