<prompt> Many different types of muscle contractions exist. In which type of contraction is muscle tension is generated, but the length of the muscle does not change?ConcentricEccentricIsokineticIsometric  <response>: In isometric contractions, muscle tension is generated but the length of the muscle does not change. Concentric contractions are a type of isotonic contraction in which the muscle shoens during the contraction. Eccentric contractions are also a type of isotonic contraction in which the muscle lengthens during the contraction. In isokinetic contractions, muscle tension is generated as the muscle contracts at a constant velocity over a full range of motion. Ref: Medical Physiology: Principles for Clinical Medicine Page 249. 