Differences between red and pale muscles

June 24, 2022

S.N	Red (slow) muscle	S.N	Pale (fast) muscle
1.	More number of type I fibers.	1.	More numbers of type II fibers.
2.	It is red due to high myoglobin content.	2.	It is pale due to low myoglobin content.
3.	There is less sarcoplasmic reticulum.	3.	There is more sarcoplasmic reticulum.
4.	Blood vessels are more extensive.	4.	Blood vessels are more extensive.
5.	There are more mitochondria.	5.	There is less mitochondria.
6.	Long latent period with slow response.	6.	Short latent period with rapid response.
7.	Less powerful contraction	7.	More powerful contraction.
8.	This muscle gives prolonged and continued activity as it undergoes sustained contraction.	8.	This muscle does not give prolonged and continued activity as it relaxes immediately.
9.	There is slow fatigue.	9.	There is quick fatigue.
10..	Depends upon cellular respiration for ATP production	10.	Depends upon glycolysis for ATP production.
11.	It is smaller in diameter.	11.	It is larger in diameter.
12.	Extensor muscle in human back, flight muscles of kites are the examples.	12.	Muscle of eyeball and flight muscles of sparrow are the example.
13.	Twitching duration is large in this muscle.	13.	Twitching duration is short here.
14.	More storage of oxygen.	14.	Less storage of oxygen.
15.	These muscles are generally thin.	15.	These muscles are generally thick.
16.	Hypertrophy is great.	16.	Hypertrophy is comparatively low.
17.	Fat burning is better.	17.	Glucose burning is good in this muscle.