Single Choice

Which of the following correctly characterises a "fast-oxidative" type of skeletal muscle fibre?

AFew mitochondria and high glycogen content
Correct Answer
BLow myosin ATPase rate and few surrounding capillaries
CLow glycolytic enzyme activity and intermediate contraction velocity
DHigh myoglobin content and intermediate glycolytic enzyme activity

Solution

Fast oxidative type of muscle fibres is generally found in the sprinters that need to run for a short amount of time. They do not need to have a very large number of mitochondria for continuous ATP production but they do need to have speed. So in such muscle fibres, there is a high glycogen content which is converting into lactic acid rapidly and fatigue is caused more early.
So, the correct option is 'Few mitochondria and high glycogen content'

SIMILAR QUESTIONS

Animal Physiology: Locomotion, Senses, Nervous and Chemical Coordination

Distinguish between red and white muscles.

Animal Physiology: Locomotion, Senses, Nervous and Chemical Coordination

The slow twitch muscle fibres which are rich in myoglobins and have abundant mitochondria are:

Animal Physiology: Locomotion, Senses, Nervous and Chemical Coordination

Match the following and mark correct option: Column I Column II A. Fast muscle fibres (i) Myoglobin B. Slow muscle fibres (ii) Lactic acid C. Actin filament (iii) Contractile unit D. Sarcomere (iv) I-band

Animal Physiology: Locomotion, Senses, Nervous and Chemical Coordination

It is known that red muscle fibres in animals can work for longer periods of time continuously. How is this possible?

Animal Physiology: Locomotion, Senses, Nervous and Chemical Coordination

State three differences between red muscle fibre and white muscle fibre.

Contact Details