Muscle 1

Question 1

Dense collagenous CT, surrounds entire muscle

Answer 1

epimysium

Question 2

Collagenous CT that surrounds bundles of muscle fibers called fasicles

Answer 2

perimysium

Question 3

sheath of CT composed of reticular fibers that surround individual muscle fibers

Answer 3

endomysium

Question 4

external lamina (contains glycoproteins + collagen); binds myofiber via the dystroglycan containing complex

Answer 4

basal lamina

Question 5

long, cylindrical, striated

multinucleated

Answer 5

myofibers

Question 6

aligned in parallel
separated by mitochondria and SR
composed of filaments called myofilaments

Answer 6

myofibrils

Question 7

forms an interconnected network of tubules
surrounds each myofibril
forms chambers called terminal cisternae on each side of T-tubule
stores Ca2+ when muscle at rest, releases when muscle stimulated

Answer 7

Sarcoplasmic Reticulum

Question 8

deep invaginations of the sarcolemma

perpendicular to the length of the myofiber

Answer 8

T-tubules

Question 9

contains myosin and actin

powerstroke occurs here

Answer 9

Sacromere

Question 10

Ca2+ attaches to…. to open up myosin binding site

Answer 10

troponin

Question 11

myosin release from actin when….

Answer 11

ATP binds to the myosin head

Question 12

power stroke occurs when….

Answer 12

ADP and Pi are released from the myosin head, giving energy for it to pull the actin

Question 13

Which discs are brought together when sacromere is brought togethr

Answer 13

Z Discs