Muscle Structure and Function (Grade 10 NSC Matric Life Sciences): Flashcards
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Basic functional units of muscle
Basic functional units of muscle
Myofibrils
Bundles of muscle fibres surrounded by perimysium
Bundles of muscle fibres surrounded by perimysium
Fascicles
Tough outer layer covering entire muscle
Tough outer layer covering entire muscle
Epimysium
Tissue layer bundling muscle fibres into fascicles
Tissue layer bundling muscle fibres into fascicles
Perimysium
Muscle hierarchy (smallest to largest)
Muscle hierarchy (smallest to largest)
Myofibrils → Muscle fibres → Fascicles → Complete muscle
Function of tendons
Function of tendons
Connect muscles to bones & transfer contraction force
Contractile units within myofibrils
Contractile units within myofibrils
Sarcomeres
Core principle of skeletal muscle contraction
Core principle of skeletal muscle contraction
Sliding filament mechanism (actin & myosin slide past each other)
What happens to H-zone during contraction?
What happens to H-zone during contraction?
Becomes narrower
Energy molecule required for muscle contraction
Energy molecule required for muscle contraction
ATP (adenosine triphosphate)