IUPUI Anatomy Exam 3 Practice Guide 2025-
2026
1. muscle fiber muscle cell
2. epimysium surrounds entire muscle
3. Perimysium Connective tissue surrounding a fascicle
4. Endomysium Connective tissue surrounding a muscle fiber
5. epimysium
6. Perimysium
7. Endomysium
8. sarcolemma plasma membrane of a muscle cell
9. sarcoplasmic reticulum Organelle of the muscle fiber that stores calcium.
10. voluntary, striated skeletal muscle
11. striated, involuntary cardiac muscle
12. involuntary, non-striat- smooth muscle
ed
13. sarcomere Contractile unit of muscle
, IUPUI Anatomy Exam 3 Practice Guide 2025-
2026
14. sarcomere Z disc to Z disc
15. myosin thick filament
16. actin thin filaments
17. I band light band
18. zone of overlap the densest, darkest area on a light micrograph
where thick and thin filaments overlap
19. h band middle of A band; thick filaments only
20. m line middle of sarcomere
21. a band dark area; extends length of the thick filaments, anisoprophic
22. move closer together Z-lines during contraction
23. doesn't change during contraction the A band
24. Contractility ability to shorten forcibly when stimulated
25. Extensibility ability to be stretched
26. Elasticity The ability of a material to bounce back after being disturbed
27. skeletal muscle sentitial or multinucleated
28. cardiac muscle mono or binucleated
29. triad group of three, pouching in of the sarcolemma
30. t tubule projection of the sarcolemma into the interior of the cell
31. organization of muscle to sarcomere 5
, muscle, fascicle,
fiber/cell, myofibril, sar-
comere
32. troponin what holds tropomyosin in place
33. actin filaments myosin binding heads will turn towards
34. calcium ions atp occurs with
35. get smaller in the sliding filament theory, H and I band
36. gets larger in the sliding filament theory, the zone of overlap
37. red fibers "Slow Twitch"
Fatigue resistant, aerobic metabolism
Myoglobin: slow to contract, darker color, smaller
38. white fibers Fast-twitch muscle fibers. They are primarily anaerobic and fatigue more
easily, bigger, pale, few mitochondria
39. slow (red) fibers a marathoner would have more
40. fast (white) fibers a sprinter would have more
41. stationary origin , multiple
42. insertion attachment to movable bone, single
43. prime movers, agonist responsible for producing a particular movement
44. synergist muscle that aids a prime mover in a movement and helps prevent
rotation
45. antagonist muscles whose actions oppose agonist
2026
1. muscle fiber muscle cell
2. epimysium surrounds entire muscle
3. Perimysium Connective tissue surrounding a fascicle
4. Endomysium Connective tissue surrounding a muscle fiber
5. epimysium
6. Perimysium
7. Endomysium
8. sarcolemma plasma membrane of a muscle cell
9. sarcoplasmic reticulum Organelle of the muscle fiber that stores calcium.
10. voluntary, striated skeletal muscle
11. striated, involuntary cardiac muscle
12. involuntary, non-striat- smooth muscle
ed
13. sarcomere Contractile unit of muscle
, IUPUI Anatomy Exam 3 Practice Guide 2025-
2026
14. sarcomere Z disc to Z disc
15. myosin thick filament
16. actin thin filaments
17. I band light band
18. zone of overlap the densest, darkest area on a light micrograph
where thick and thin filaments overlap
19. h band middle of A band; thick filaments only
20. m line middle of sarcomere
21. a band dark area; extends length of the thick filaments, anisoprophic
22. move closer together Z-lines during contraction
23. doesn't change during contraction the A band
24. Contractility ability to shorten forcibly when stimulated
25. Extensibility ability to be stretched
26. Elasticity The ability of a material to bounce back after being disturbed
27. skeletal muscle sentitial or multinucleated
28. cardiac muscle mono or binucleated
29. triad group of three, pouching in of the sarcolemma
30. t tubule projection of the sarcolemma into the interior of the cell
31. organization of muscle to sarcomere 5
, muscle, fascicle,
fiber/cell, myofibril, sar-
comere
32. troponin what holds tropomyosin in place
33. actin filaments myosin binding heads will turn towards
34. calcium ions atp occurs with
35. get smaller in the sliding filament theory, H and I band
36. gets larger in the sliding filament theory, the zone of overlap
37. red fibers "Slow Twitch"
Fatigue resistant, aerobic metabolism
Myoglobin: slow to contract, darker color, smaller
38. white fibers Fast-twitch muscle fibers. They are primarily anaerobic and fatigue more
easily, bigger, pale, few mitochondria
39. slow (red) fibers a marathoner would have more
40. fast (white) fibers a sprinter would have more
41. stationary origin , multiple
42. insertion attachment to movable bone, single
43. prime movers, agonist responsible for producing a particular movement
44. synergist muscle that aids a prime mover in a movement and helps prevent
rotation
45. antagonist muscles whose actions oppose agonist
