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Muscle cells hold a very high concentration of mitochondria because contraction needs:
AEnergy
BEnzymes
CEstrogen
DElastin
Answer & Solution
Correct answer: A. Energy
1. Mitochondria supply the cell with ATP.
2. Contracting fibres consume ATP at a high rate.
3. So muscle cells need a lot of energy.
_Source: OpenStax Concepts of Biology, Chapter 3, Cell Structure and Function._
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