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True or False: if false, chose the answer that corrects the statement.
The smallest contractile unit of a muscle is the muscle cell.
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9. Muscle Tissue
Structure of a Skeletal Muscle
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Where does 95% of the energy needed for contraction come from during moderate exercise?
A
creatine phosphate
B
anaerobic glycolysis
C
aerobic respiration
D
lactic acid
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Understand the different sources of energy for muscle contraction: Creatine phosphate, anaerobic glycolysis, aerobic respiration, and lactic acid.
Recognize that during moderate exercise, the body requires a sustained and efficient energy source to support prolonged activity.
Aerobic respiration is the process where oxygen is used to convert glucose into ATP, providing a large amount of energy efficiently over time.
Compare aerobic respiration with anaerobic glycolysis, which provides quick energy but is less efficient and produces lactic acid as a byproduct.
Conclude that aerobic respiration is the primary source of energy during moderate exercise due to its efficiency and ability to sustain energy production over longer periods.
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