Animal Physiology: Locomotion, Senses, Nervous and Chemical Coordination
Distinguish between red and white muscles.
State three differences between red muscle fibre and white muscle fibre.
Red muscle fibres are dark red due to the presence of myoglobin. They have large amount of mitochondria whereas, the white muscle fibres have low amount of mitochondria and myoglobin.
Red muscle fibres have thin fibres which allows them to contract slowly whereas, white muscle fibres have thick fibres which make them to contract fast.
Red muscle fibres are also called type I muscles or slow twitch muscles whereas, white muscle fibres are called type II muscles or fast twitch muscles.
Red muscle fibres are highly resistant to fatigue whereas, muscles can easily get fatigue.
Red muscles obtain energy from aerobic metabolism whereas, white muscle fibres obtain energy from anaerobic metabolism.
Red muscle fibres have slow conduction due ti low myosin ATPase activity whereas, white muscle fibres have fast conduction due to high myosin ATPase activity.
Distinguish between red and white muscles.
The slow twitch muscle fibres which are rich in myoglobins and have abundant mitochondria are:
Which of the following correctly characterises a "fast-oxidative" type of skeletal muscle fibre?
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
It is known that red muscle fibres in animals can work for longer periods of time continuously. How is this possible?