The cardio respiratory capacity is related to____________?
Correct answer: C. Normal physical endurance
- A. Strength
- B. Flexibility
- C. Normal physical endurance
- D. Agility
Explanation
Cardiorespiratory capacity measures how effectively the heart, lungs and blood supply oxygen during sustained activity, so it is most closely related to physical endurance. Strength concerns force production, whereas flexibility concerns range of motion; students may choose strength because both are components of physical fitness.
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Muscles covers skeletal, smooth and cardiac muscle, their microscopic structure and the roles of tendons, myofibrils, actin and myosin. It explains the sliding filament mechanism, sarcomere shortening, neuromuscular transmission and calcium regulation, while distinguishing voluntary skeletal movement from involuntary contraction in smooth and cardiac muscle.
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