Write the difference between : Red and White muscles
|Red muscle fibre||White muscle fibre|
|1||They are thin||They are much thicker|
|2||They contain abundant mitochondria, low glycogen content and poorly formed sarcoplasmic||They are poor in mitochondria, and have abundant glycogen granules and well formed sarcoplasmic reticulum|
|3||They are dark red as they contain abundant pigment myoglobin||They are light in colour as they have vary little myoglobin|
|4||Their myoglobin stores O2 as oxymyoglobin that releases O2 for oxidation during muscle contraction||They have little or no store of oxygen|
|5||They get energy for contraction by aerobic respiration||They get energy for contraction mainly by anaerobic respiration|
|6||They accumulate little lactic acid||They accumulate lactic acid during strenuous work|
|7||They undergo slow sustained contractions for long periods||They undergo fast contractions for short periods|
|8||They are not fatigued with work||They soon get fatigued with work|
They are innervated by thin, slow conducting nerve fibres.
Example: Extensor muscles of the back in man
They are innervated by thick, fast conducting nerve fibres.
Example: Eyeball muscles
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- Concept of Muscle
Solution Write the Difference Between : Red and White Muscles Concept: Concept of Muscle.