muscle microanatomy quiz

Question 1

myofibrils

Answer 1

individual twizzler strands
made up of filaments called actin and myosin

Question 2

myosin

Answer 2

thicker than actin (the anchored part of a sarcomere)
one of the two filaments that make up myofibrils

Question 3

actin

Answer 3

project off of z line or z disc

Question 4

muscle fibers/muscle cells/myofiber

Answer 4

covered by endomysium (2 layers here)

Question 5

sarcolemma

Answer 5

membrane that wraps around bundle of muscle fibers (twizzler strands)

Question 6

endomysium

Answer 6

wraps each individual muscle cell

Question 7

entire muscle

Answer 7

covered by epimysium

Question 8

fasicles

Answer 8

covered by perimysium
bundles of bundles of muscle cells

Question 9

sacromere

Answer 9

smallest contractile unit

Question 10

titin

Answer 10

loop-de-loops connecting myosin to the z line or z disc

Question 11

m line

Answer 11

in the middle of the sacromere

Question 12

myosin

Answer 12

anchored horizontal filaments
thicker than actin

Question 13

actin

Answer 13

projecting from z line or z disc

Question 14

h zone

Answer 14

contains the m-line only

Question 15

a band

Answer 15

contains the myosin only
*dArk portion