Quiz Muscles Week 10 Muscles 1. What neurotransmitter binds at a motor end-plate to trigger depolarization?

What regulatory protein facilitates contraction in smooth muscles?

Which protein primarily composes the thin myofilaments in muscle fibers?

Which connective tissue layer surrounds a bundle of muscle fibers, known as a fascicle?

Which part of the sarcomere contains only actin filaments?

In skeletal muscle, which structure represents the lightest area in a sarcomere when observed under a microscope?

In skeletal muscle, which structure surrounds an individual muscle fiber?

The thick filaments in a sarcomere are primarily composed of which protein?

What term is used to describe the repeating units of striated muscle fibers?

Which of the following muscle types is under voluntary control?