C. filaments slide apart D. the release of stored calcium ion from its storage area area E. the release of ATP from its storage 2. Humans use the same muscles to lift a paper clip as we do to lift a 10-lb weight. The following answers are used for the next 3 questions. Answers may be used more than once. A. Skeletal B. Cardiac C. Smooth D. all of the above 3.
Contractions are under voluntary control.
The contractile proteins are myosin and actin. A. one muscle pushes, the other muscle pulls B. fast and slow muscle fibers C. skeletal muscle and smooth muscle D. reciprocal inhibition E. extensors and flexors 8. A. myofilaments B. joints C. ligaments D. tendons E. muscle fibers 9. C. smooth muscle D. cross bridges E. cartilage 10. A. thyroid B. parathyroid C. osteoid D. calcium E. insulin 11.