When joints are not regularly moved through their entire range of motion, muscles and ligaments eventually . a. shorten b. lengthen c. degenerate d. bend

a. shorten

Explanation:

Inability or failure for joints to move through their entire range of motion is caused by constrictions. These constrictions often results when the excess adipose tissues that surrounds the muscles and ligaments are not in required adequate proportion. These constrictions can be caused by ageing, fatigue, muscular diseases etc. As a result of these constriction in the joints, let say for example, the knee joint, the muscle and ligaments tends to shorten in length.

the sphincter muscles at the end of the digestive tract is the anus.

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