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Muscle Questions 1. The only movement a muscle can do is contract. This means that they become ______________. Skeletal muscles are attached to bones by _________________. When muscles contract they become _____________. This causes the attached bones to ____________________. 2. Why does the body shiver when it is cold? 3. Muscles work in pairs. When one muscle contracts the other must __________________. 4. An example of a pair of muscles working together are the ______________ and the ___________________. 5. The muscles named above work together to produce two movements, flexion and extension (bending and straightening) a joint. Briefly describe what must happen to each muscle for each movement to be accomplished. 6. Muscles contract when they receive an impulse that divides out into many receptors buried throughout the muscle called ________________. 7. The site where a muscle attaches to a stationary bone is called the ________________ of the muscle. Where it attaches to the bone that will move during the contraction is called the ______________ of the muscle. 8. When a tendon becomes inflamed, it is referred to as _______________. 9. In order for the body to maintain an upright position both muscles in a pair must ____________ ____________________. 10.Fill in the following: What muscle is contracting when you: Straighten your arm? _________________________ Bend over? _________________________________ Raise your arms to the side? ___________________ Bend your knee? ____________________________ Point your toes? _____________________________