Muscle System Key Terms

1. A tough, sheet like membrane that covers and protects the muscle tissue
4. A large abundant protein of striated muscles, helps stabilize the thick filaments.
5. Muscle that assist the agonist muscle for a specific action at a joint
6. A thin sheath of connective tissue found on the surface of muscles, they are continuous with external tendons
8. The attachment site that doesn’t move during muscle contractions
9. A protein that is an important contributor to the contractile property of muscles.
10. Muscles found in the walls of internal organs that are involuntary and non-striated
13. Muscles attached to bones that have voluntary movements and are striated
15. The muscle that relaxes or lengthens during a muscle contraction
16. An instrument that measures the amount of tension produced over time
17. The dense connective tissue that surrounds the entire muscle tissue.
19. Small muscles that act to keep bones immobile when needed.
21. A synaptic connection between the terminal end of a motor nerve and a muscle
22. The prototype of a molecular motor, a protein that converts chemical energy in the form of ATP to mechanical energy, generating force and movement
24. The tension or resistance in the relaxed muscle

2. A excitatory neurotransmitter that carries messages to the brain to start muscle contractions to move your muscles.
3. Neuronal cells located in the central nervous system controlling a variety of downstream targets.
4. A fibrous connective tissue that attaches muscle to bone.
7. A layer of connective tissue that ensheaths each individual muscle fiber
11. Muscles found in the walls of the heart they are striated and involuntary
12. The main contractile unit of muscle fiber in the skeletal muscles.
14. Occurs when one muscle fiber contracts in response to a stimulus by the nervous system
18. Basic rod-like organelle of a muscle cell.
20. minimum amount of energy needed to make a muscle fiber contract
23. The muscle that is contracting during a muscle contract