Chapter 10.1 - Muscles Overview

3. ___ reticulum; similar to smoother ER in other cells; contain terminal cisternae
8. darker region where thick and thin filaments overlap; contain H-Zone and M-Line
9. the ability to respond to stimulus from the nervous system
10. long proteins found in muscle fibers; actin, myosin, titin; formed of filaments
11. areolar CT that wraps individual fibers; electrical insulation, capillary support
13. muscles that move body, maintain posture, regulate process, and produce heat
15. lighter appearing regions with only thin filaments; get smaller during contraction
16. myofilaments arranged in repeating units; overlapping thick and thin filaments
17. dense, irregular CT that wraps around the whole muscle
19. cytoplasm of muscle fibers; contains lots of mitochondria and contractile proteins
21. contractile protein groups; thick - bundles of myosin; thin - twisted strands of actin
23. stores oxygen for aerobic ATP; stores glycogen; creatine phosphate can quickly donate phosphate for ATP

1. ___ Tubles (T-tubules); structures etched into cell that contains calcium pumps
2. muscle fibers contain multiple ___; they have fused myoblasts
4. dense, irregular CT that wraps around fascicles; houses blood vessels and nerves
5. bundles of muscle fibers held together by CT
6. terminal ___; bound sacks that serve as reservoirs for calcium ions
7. region with only thick filaments; disappears during contraction
12. dense protein discs that delimit the sarcomere
13. plasma membrane of muscle fiber; use voltage gated ion channels for electrical signals
14. the long, thin muscle cells; each muscle is its own organ
18. median of sarcomere
20. layers of CT superficial to epimysium that separates individual muscles and binds muscles of similar function together; deep and superficial
22. mechanism of moving ions across membranes, especially calcium ions; ion ___