AQA A LEVEL BIOLOGY PAPER 3| 7402/3 VERSION 1.0 FINAL QUESTION PAPERS & MERGED MARKING SCHEME | JUNE 2023
Describe how stimulation of a Pacinian corpuscle produces a generator potential. [3 marks] Scientists investigated the stimulation of a Pacinian corpuscle in the skin of a fingertip. The scientists applied two different pressures to the fingertip and recorded the changes in membrane potential of the Pacinian corpuscle’s sensory neurone. Figure 1 shows the scientists’ results. Figure 13 *03* Turn over ► IB/M/Jun23/7402/3 Do not write outside the 0 1 . 2 Use Figure 1 to describe what is meant by the all-or-nothing principle. box [2 marks
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- AQA A LEVEL BIOLOGY
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- AQA A LEVEL BIOLOGY
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- Subido en
- 25 de febrero de 2024
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- 68
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- 2023/2024
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aqa a level biology paper 3
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