In typical muscle composition, which component is the largest?

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Multiple Choice

In typical muscle composition, which component is the largest?

Water is the largest component of muscle tissue. Muscle is highly hydrated, with roughly three-quarters of its weight being water. This water exists both inside muscle cells (cytosol) and in the surrounding extracellular fluid, supporting essential processes like metabolic reactions, nutrient transport, waste removal, and temperature regulation. Proteins are a major part of the dry mass of muscle (the contractile proteins like actin and myosin, plus enzymes and structural proteins), but when you consider the whole tissue, water still makes up a larger proportion. Minerals appear in small amounts as ions, and lipids are present mainly as membranes and intramuscular fat, but these together are far less than the water content.

Water is the largest component of muscle tissue. Muscle is highly hydrated, with roughly three-quarters of its weight being water. This water exists both inside muscle cells (cytosol) and in the surrounding extracellular fluid, supporting essential processes like metabolic reactions, nutrient transport, waste removal, and temperature regulation. Proteins are a major part of the dry mass of muscle (the contractile proteins like actin and myosin, plus enzymes and structural proteins), but when you consider the whole tissue, water still makes up a larger proportion. Minerals appear in small amounts as ions, and lipids are present mainly as membranes and intramuscular fat, but these together are far less than the water content.

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