Final answer:
The constant tension produced by muscles for long periods of time is called isometric contraction. Isometric contractions occur when muscle tension increases, but muscle length remains the same.
Step-by-step explanation:
Constant tension produced by muscles for long periods of time is called isometric contraction. Isometric contractions occur when muscle tension increases, but muscle length remains the same. These contractions are active in maintaining posture and bone and joint stability.
The constant tension produced by muscles for long periods of time is referred to as an isometric contraction. During an isometric contraction, the muscle tension increases, but the muscle length remains the same. This type of muscle activity is common in maintaining posture and stability in joints, as the muscles generate force but the angle of the joints they are associated with does not change. Therefore, in response to the multiple-choice question, the correct answer is A) Isometric contraction.