Question

Fast-twitch fibres are preferentially affected in Duchenne’s muscular dystrophy

BECAUSE
Fast-twitch fibres contain less mitochondria than slow-twitch
​​​​​​​Question options:
- TRUE AND TRUE
- TRUE AND FALSE
- FALSE AND TRUE
- FALSE AND FALSE

Answer 1

Fast-twitch fibers are preferentially affected in Duchenne’s muscular dystrophy because they contain less mitochondria than slow-twitch fibers.

Step-by-step explanation:

Fast-twitch fibers are preferentially affected in Duchenne’s muscular dystrophy because they contain less mitochondria than slow-twitch fibers.

In general, fast-twitch fibers have fewer mitochondria compared to slow-twitch fibers. Mitochondria play a crucial role in producing energy for muscle contraction through aerobic respiration, so the deficiency of mitochondria in fast-twitch fibers can lead to muscle weakness and degeneration in conditions like Duchenne's muscular dystrophy.

This makes the statement 'Fast-twitch fibers are preferentially affected in Duchenne’s muscular dystrophy because fast-twitch fibers contain fewer mitochondria than slow-twitch' TRUE.