Explain how the structure of skeletal muscles contribute to their function. Discuss the process of excitation/contraction and how the organization at the tissue, cell, and molecular level aid that process. Make sure to explain the sliding filament theory and neuromuscular junction.

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction.