Section 4 recording
The Biology of Hibernation
You will hear a biology lecturer giving a talk on the physiological mechanisms of animal hibernation.
One speaker · British English · 3:34
In the real test you hear each recording once. Read the questions first, then play it through without pausing.
Go to the questions ↓Questions 1–6
Complete the sentences below. Write ONE WORD AND/OR A NUMBER for each answer.
Word limit: ONE WORD AND/OR A NUMBER
1The Arctic ground squirrel can lower its core body temperature to degrees Celsius without freezing.
2Hibernating mammals generate warmth without shivering by burning a specialised type of fat.
3During deep torpor, a black bear's heart rate may fall to beats per minute.
4Animals temporarily awake from torpor in order to reactivate their system.
5Bears maintain their muscle condition by recycling from waste products to construct new proteins.
6Medical researchers believe that induced torpor could help prevent brain damage following a .
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