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Which of the fibres are considered to have darker appearance than the others?

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Which of the fibres are considered to have darker appearance than the others?

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Slow twitch has a higher density of capillaries compares to the others

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What does the sarcoplasmic reticulums do?

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What does the sarcoplasmic reticulums do?

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It stores and releases calcium ions in the body's muscle cells.

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Ot of the two fibres which has a large capillary 

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Ot of the two fibres which has a large capillary 

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The sarcoplasmic reticulum controls the realise of calcium ions and regulates muscle fibre contractions

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Regulates the calcium ion concentration in the cytoplasm of striated muscle cells 👍😋😎

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What organelles are preset I msle fibres

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What organelles are preset I msle fibres

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Contains alot  of mitochondria

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Fast twitch (type 2 a) is darker as it's red, whereas the other is white.

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What organelles are present in muscle fibres? 

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What organelles are present in muscle fibres? 

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Lots of mitochondria, Golgi apparatus, ER,SER and others

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What role does myoglobin do in muscle fibre

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What role does myoglobin do in muscle fibre

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It is an iron and oxygen binding protein

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Which muscle fibres are more efficient at using oxygen to generate energy in the form ATP?

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Which muscle fibres are more efficient at using oxygen to generate energy in the form ATP?

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Slow twitch since it uses aerobic respiration and has a higher capillary density

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Which of the fibres are considered to have a darker appearance than the other?

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Which of the fibres are considered to have a darker appearance than the other?

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Type 1 fibre

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What organelles are present in muscle fibres?

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What organelles are present in muscle fibres?

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Mitochondria
Golgi apparatus
ER
SER

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This controls the release of calcium irons and regulates muscle fibre contractions

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Out of the two fibres, which has a large capillary network? Why is this significant ?

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Out of the two fibres, which has a large capillary network? Why is this significant ?

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Slow twitch has a higher capillary density since it needs more oxygen for aerobic respiration.

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There are 3 type of muscle fibres. Type 1 is long distance slow twitch, type 2A is fast twitch oxidative and type 2B is fast twitch glycolytic.

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What role does myoglobin do in a muscle fibre

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What role does myoglobin do in a muscle fibre

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Am iron oxyge biding

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Which of the two fibres are considered to have a darker appearance than the other?

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Which of the two fibres are considered to have a darker appearance than the other?

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The sarcolemma is transparent so that they myofibrils are visible underneith. So this means that the myofibrils have a darker apperance. :)

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Myoglobin binds with oxygen and iron in muscles much in the same way haemoglobin binds with oxygen  and iron in blood, it's therefore crucial to supplying oxygen and iron to muscles.

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What does the sarcoplasmic reticulum do?

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What does the sarcoplasmic reticulum do?

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Controlled the release of calcium ions and regulates the contractions of the muscle fibres

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What role does myoglobin do in a muscle fibre?

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What role does myoglobin do in a muscle fibre?

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There are 2 types of muscle fibres.