7.3 Twitch Fibres Flashcards

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1
Q

What are darker muscles in the legs called?

A

Fibres are called Slow Twitch Fibres.

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2
Q

What are Slow Twitch Fibres specialised for?

A

Slower sustained contraction.

Able to cope with long periods of exercise.

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3
Q

Due to the fact that Slow Twitch Fibres need to be able to cope with long periods of exercise, what do they need to carry out?

A

Need to carry out a large amount of aerobic respiration.

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4
Q

What are the key features of Slow Twitch Fibres?

A
  1. Many mitochondria.
  2. High concentrations of respiratory enzymes which carry out aerobic respiration.
  3. Large amounts of dark pigments myoglobin.
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