Final answer:
Muscle spindles and Golgi tendon organs are proprioceptive sense organs in muscles and tendons that detect stretch and tension, respectively, to pre-set muscle tension and prevent injury.
Step-by-step explanation:
The sense organs that measure the strain in a muscle and can be used to pre-set the tension of muscles are specifically called muscle spindles and Golgi tendon organs. Muscle spindles are stretch receptors within the skeletal muscle tissue that detect the amount of stretching, or lengthening, of muscles and initiate a reflex to prevent muscle tearing.
Golgi tendon organs, on the other hand, act as tension receptors to detect the force of muscle contractions, thereby helping to prevent over-contraction and potential damage. Together, these proprioceptive receptors provide essential feedback to the central nervous system, involving the spinal cord and cerebellum, which coordinates muscle contraction. This sensory information is vital for maintaining posture and producing movements that require a high level of precision.