RS-T11-Q22 · 呼吸数据「分析 · 评价 · P5 衔接」

先自己写完再对答案；卡住的地方回看这段讲解（公开课时间码 36:20–38:40）

来源 9700_s13_qp_42.pdf → 9700_s13_ms_42.pdf　|　小问：b

触发题型：看到呼吸实验数据表/曲线 / 问 conclusion、evaluation、改进设计（P5 衔接）

✅ Mark Scheme 得分点（原文）

逐条计分：n 分写 n 条；红字为考官明确不接受（Do not accept）

(b)(i)

1. or
2. pump usually maintains the resting potential;
3. 2.
4. (during resting potential) membrane polarised
5. or
6. positive charge outside (neurone) / negative charge inside (neurone) / -70mV inside
7. neurone relative to outside / potential difference across membrane;
8. 3.
9. (when pump stops working), ions (only) move by diffusion;
10. 4.
11. Na
12. the neurone;
13. into
14. 5.
15. outward diffusion of K
16. is limited / K
17. stay in neurone;
18. 6.
19. ref. non voltage-gated channels;
20. 7.
21. (eventually) inside of the neurone, becomes less negative / contains (relatively)
22. more positive ions
23. or
24. there is a reduced potential difference across the membrane;
25. [max 4]
26. 1.
27. voltage gated (calcium) channels open;
28. (ii)
29. 2.
30. (calcium ions move in) by diffusion / move down their concentration gradient;
31. [2]
32. 1.
33. Na
34. / K
35. , cannot move through membrane;