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From muscle to sarcomere

From muscle to sarcomere

Hierarchy from skeletal muscle to muscle fibre to myofibril and a comparison of relaxed and contracted sarcomeres with Z lines, actin, myosin, A band, I band, H zone, and M line labelled Skeletal muscle is organised in a hierarchy: whole muscle contains muscle fibres, fibres contain myofibrils, and myofibrils contain repeating sarcomeres. The sarcomere is the basic contractile unit.

Sliding filament theory Lesson

  1. A Level
  2. /Biology
  3. /Sliding filament theory

Step-by-step lessons covering Edexcel A A Level Biology Sliding filament theory for A Level Biology. Each lesson works through exam-style questions in Paper 1, Paper 2 and Paper 3 format. Build a strong foundation in cell biology and biochemistry early on, since later topics on genetics, ecology and physiology all draw on these core concepts.

Lessons