Colour of Type 2 fibres is white.

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Study for the Advanced Subsidiary WJEC Physical Education Test. Engage with flashcards and multiple-choice questions, each providing hints and explanations. Prepare thoroughly for your exam!

Multiple Choice

Colour of Type 2 fibres is white.

Explanation:
Type 2 fast-twitch fibres are pale because they contain less myoglobin, the red pigment that stores oxygen in muscle. With less myoglobin, the fibres look white rather than red. These fibres rely more on anaerobic energy pathways and have lower oxygen storage, which is reflected in their paler color. Red would indicate high myoglobin (typical of slow-twitch fibres), while pink or brown aren’t typical descriptors for Type 2 fibres in normal muscle.

Type 2 fast-twitch fibres are pale because they contain less myoglobin, the red pigment that stores oxygen in muscle. With less myoglobin, the fibres look white rather than red. These fibres rely more on anaerobic energy pathways and have lower oxygen storage, which is reflected in their paler color. Red would indicate high myoglobin (typical of slow-twitch fibres), while pink or brown aren’t typical descriptors for Type 2 fibres in normal muscle.

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