Microscopic anatomy doover

Question 1

surrounds entire muscle, dense irregular connective tissue

Answer 1

Epimysium

Question 2

Dense irregular tissue surrounding fasciles

Answer 2

Perimysium

Question 3

Fine areolar connective tissue, surrounds individual muscle fibers

Answer 3

Endomysium

Question 4

cytoplasm of muscle cell contains glycosomes and myoglobin

Answer 4

Sarcoplasm

Question 5

stores glycogen that provide glucose during muscle cell activity for ATP production

Answer 5

Glycosomes

Question 6

red pigment that stores oxygen

Answer 6

myoglobin

Question 7

repeating bands of light and dark bands (striations) within sarcoplasm

Answer 7

Myofibrils

Question 8

between z disc, functional unit of skeletal muscle

Answer 8

Sarcomere

Question 9

muscle equivalent of actin-myosin

Answer 9

Myofilament

Question 10

during contraction, globular heads of thick filament link thick and thin filaments together

Answer 10

Cross bridges

Question 11

When an electrical impulse passes by, t tubule proteins change shape, causing SR proteins to change shape, causing release of Ca into cytoplasm

Answer 11

Triad relationship

Question 12

myosin, double globular head, extend entire length of A band and connect at M line

Answer 12

Thick filaments

Question 13

actin, extend across I band and half in A band, contain troponin and tropomyosin

Answer 13

Thin filaments

Question 14

protein that spirals around actin to stabilize and stiffen. In a relaxed muscle, they block myosin-binding sites

Answer 14

Tropomyosin

Question 15

protein that inhibits actin binding. Binds to tropomyosin and binds calcium molecules.

Answer 15

Troponin

Question 16

Protein that anchors thick filament to z disc, stabilize thick filament, prevents over stretching

Answer 16

Titin

Question 17

link thin filaments to integral proteins of sarcolemma

Answer 17

Dystrophin

Question 18

Part of sarcoplasm, surrounds each myofibril, communicate at H zone, regulars intracellular levels of ionic calcium. Stores calcium and releases on demand of muscle fiber contraction

Answer 18

Sarcoplasmic reticulum

Question 19

Part of sarcoplasm, A Band- I band junction, increase surface area, run along paired terminal cisterns of SR. Triads encircle each sarcomere, conduct impulses to deepest region of muscle cell and every sarcomere, signal release of calcium

Answer 19

T-tubules