Multiple choice

Which among the following is also known as slow twitch?

  1. Skeletal muscle

  2. Type I Fibres

  3. Cardiac muscle

  4. Smooth muscle

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

These fibres are also called slow twitch or slow oxidative fibres.They contain large amounts of myoglobin, many mitochondria and many blood capillaries. Type I fibres are red, split ATP at a slow rate, have a slow contraction velocity, very resistant to fatigue and have a high capacity to generate ATP by oxidative metabolic processes. Such fibres are found in large numbers in the postural muscles of the neck.

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