1						2			3					4
		5				6
															7
						8														9
															10
						11
12

Across 6. Myosin pivots, changing from high energy to low energy state 7. Sliding tropomyosin exposes ________ binding sites on the thin filament 8. The thin filament pushes toward the sarcomere's center 12. New ATP binds to myosin head

Down 1. ATP converts to ADP and phosphate 2. Myosin head changes shape because of binding of new ATP 3. Step when myosin heads on thick filament are attracted to myosin binding sites on thin filament 4. Myosin head on thick filament releases from the myosin binding site on thin filament 5. Myosin head pivots from low energy to high energy state 9. ADP and phosphate are released from the myosin head 10. As long as ________ is being released from the sarcoplasm, the muscle fiber will continue to shorten 11. Prior to contraction, calcium causes ________ to change shape on actin