contraction of the skeletal muscle
- Created by: Kerryn Ludlow
- Created on: 10-05-13 14:17
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- Contraction of the skeletal muscle
- known as the sliding filament mechanism
- evidence for this...
- there is more overlap of actin and myosin in a contracted muscle than in a relaxed one.
- when the muscle contracts, the following happens...
- the i-band become narrower.
- the z bands move closer together - the sacromere shortens.
- the H-zone becomes narrower.
- the A-band remains the samewidth and the width is determined by the length of the myosin filaments
- evidence for this...
- proteins involved:
- Myosin
- made up of two types of proteins
- a fibrous protein arranged into a filament made up of several hundred molecules.
- a gobular protein formed into two bulbous structures at one end.
- made up of two types of proteins
- Actin
- a gobular protein whos molecules are arranged into chains that are twisted around one another to form a helical structure.
- Tyopomyosin
- long thin threads woven around the actin filaments.
- Myosin
- The sliding filament mechanism of muscle contraction
- known as the sliding filament mechanism
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