The sarcomere is the contractile unit of skeletal muscle fibres. Describe the role of troponin molecules in the contraction of a sarcomere. (4) ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................
Exam No：wbi15-01-que-20240608 Year：2024 Question No：4(b)
Answer:
A description that includes four of the following points:
- calcium ions \{bind / attach\} to the troponin (1)
- causing troponin to change shape (1)
- \{moving / pulling / pushing\} tropomyosin (1)
- (therefore) exposes myosin binding site (1)
- allowing myosin head to \{bind / form crossbridge\} (1)
- calcium ions \{bind / attach\} to the troponin (1)
- causing troponin to change shape (1)
- \{moving / pulling / pushing\} tropomyosin (1)
- (therefore) exposes myosin binding site (1)
- allowing myosin head to \{bind / form crossbridge\} (1)
Knowledge points:
CH7 – Respiration, Muscles and the Internal Environment
Solution:
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