Question

Question -4. Strength of muscle is dependent upon the number of which types
of fibre?
O
Red
White
O
Yellow
O All of the above​

Answer 1

Answer:

All of the above

Plz mark as brainliest answer....

Answer 2

Answer:

The correct answer to this question is Red and white.

Explanation:

Given - The strength of muscle is dependent upon the number.

To Find -  which types of fiber are used for the strength of muscle is dependent upon the number.

Red and white muscle fibers are the two different kinds of muscle fibers.

1. The diameter of red muscular fibers is tiny. Myoglobin, a crimson hemoprotein, is what gives these muscle fibers their dark red color. In the red fibers, myoglobin binds to and stores oxygen as oxymyoglobin. Oxygen is released by oxymyoglobin for use during muscle contraction. They have more mitochondria, more blood capillaries, and less sarcoplasmic reticulum. They engage in aerobic oxidation without building up a lot of lactic acids. Red muscular fibers can therefore contract for a longer time without becoming tired. These muscle fibers twitch slowly and for extended durations. Examples are the human back's extensor muscles and the kite's flying muscles.

2. The diameter of muscle fibers in white is greater. Since these muscles lack myoglobin, their fibers are lighter in color. They have more sarcoplasmic reticulum, more mitochondria, and fewer blood capillaries. They use anaerobic oxidation to produce energy, which causes them to produce a lot of lactic acid during hard exertion and quickly get exhausted. For brief intervals, these fibers contract at a rapid pace. Examples are the muscles in the eyes and the sparrow's wings.

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