Figure below shows the muscles moving a bone by contracting or relaxing. Which of the following statements CORRECTLY describes how organs of the musculo-skeletal systems work in pairs?
A. When you flex your arm, the upper arm muscles contract.
B. When you extend your arm, the upper muscles contract.
C. When you extend your arm, the biceps become shorter.
D. When you flex your arm, the biceps get longer.
Please answer
A. When you flex your arm, the upper arm muscles contract.
B. When you extend your arm, the upper muscles contract.
C. When you extend your arm, the biceps become shorter.
D. When you flex your arm, the biceps get longer.
Please answer
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Answer:
a
Explanation:
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