Across
- 4. Specialized membrane that encloses each skeletal muscle fiber.
- 5. Protein strand that blocks actin's binding sites until calcium arrives.
- 8. Increase in muscle fiber size from repeated workload.
- 9. Phase when muscle fibers return to resting length after tension stops.
- 11. Process in which muscle fibers generate tension and shorten.
- 14. Calcium‑binding protein that exposes actin's active sites.
- 15. Oxygen‑storing pigment found inside muscle fibers.
Down
- 1. Increased muscle tension caused by rapid, repeated stimuli.
- 2. Tough connective tissue cord that attaches muscle to bone.
- 3. Decline in a muscle's ability to generate force after prolonged activity
- 5. Sustained maximal contraction from high‑frequency stimulation.
- 6. Alternating light and dark bands visible in skeletal muscle.
- 7. Anaerobic pathway producing ATP and lactic acid when oxygen is low.
- 10. Decrease in muscle size due to disuse or lack of stimulation.
- 12. Protein filament that slides past myosin to shorten a muscle fiber.
- 13. Cytoplasm of a muscle cell that stores glycogen, myoglobin, and organelles.