Across
- 2. composed primarily of actin and myosin
- 4. partial but sustained contraction
- 6. muscle type that is involuntarily controlled and not striated
- 9. muscle that flexes lips
- 12. consists of a motor neuron and the muscle fibers that it controls
- 13. flexes neck, rotates head
- 14. disks on ends of cardiac muscles cells
Down
- 1. responsible for the striated apppearance of skeletal muscles
- 3. occurs after death when muscles fail to relax due to a lack of ATP
- 4. pigment responsible for the reddish-brown color of skeletal muscle
- 5. muscles that assist a prime mover
- 7. organ that is able to convert lactic acid into glucose
- 8. flexes the leg at the knee
- 10. closes the jaw
- 11. abducts the upper arm