| Date | May 2021 | Marks available | 1 | Reference code | 21M.1.SL.tz0.15 |
| Level | Standard Level | Paper | Paper 1 | Time zone | time zone 0 |
| Command term | Question number | 15 | Adapted from | N/A |
Question
What shortens during muscular contraction according to the sliding filament theory?
A. Z line
B. A band
C. H zone
D. Actin
Markscheme
C
Examiners report
4th most difficult question (42.23 % correctly answered).
Syllabus sections
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18N.2.HL:.tz0.8e:
Explain sliding filament theory after acetylcholine (ACh) increases muscle membrane permeability.
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22M.1.SL.tz0.16:
The diagram shows an athlete extending their left elbow while throwing a javelin. According to the sliding filament theory, which occurs in the muscle fibres of the athlete’s left triceps?
[Source: Eric Shamus, Jennifer Shamus: Sports Injury Prevention & Rehabilitation www.accessphysiotherapy.com Copyright
© McGraw-Hill Education. All rights reserved.]A. The H zone increases.
B. The A band shortens.
C. The Z lines move closer together.
D. The A band lengthens.
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19M.2.SL.tz0.3a:
Identify the structures A, B and C in the diagram.
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19M.2.HL:.tz0.3a:
Identify the structures A, B and C in the diagram.
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19M.1.SL.tz0.15:
A skier, when snowplowing, turns the soles of their feet outwards. What action are the feet performing?
A. Extension
B. Circumduction
C. Inversion
D. Eversion
- 17M.2.SL.tz0.3b: Explain the role of ATP in muscle contraction.
- 17N.2.SL.tz0.6b: Outline the process of the sliding filament theory after calcium has been released and until...
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16N.2.SL.tz0.3d:
Explain the role of myosin in muscle contraction after adenosine triphosphate (ATP) is broken down and releases energy.
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18N.2.SL.tz0.5e:
Explain sliding filament theory after acetylcholine (ACh) increases muscle membrane permeability.
