skeletal muscle

Question 1

what are the 4 main functions of skeletal muscle?

Answer 1

-maintain posture
-transport and store substances
-generating heat
-producing movement

Question 2

tendons join …

Answer 2

MUSCLE to bone

Question 3

what is myofibril composed of

Answer 3

1000s of sarcomeres joined in series and in parallel

Question 4

myosin (purple) =
actin (green) =

Answer 4

myosin = thick filament
actin = thin filament

Question 5

the myosin is made up of

Answer 5

head and tail

Question 6

sarcomere is the …
(layman term sentence)

Answer 6

smallest unit of skeletal muscle and where movement occurs
w actin and myosin being functional proteins that interact for this movment to occur

Question 7

what does the sliding filament mechanism describe

Answer 7

during contraction, filaments slide past eachother

Question 8

calcium ->

Answer 8

falls to troponin -> this moves the position of tropomyosin which uncovers the myosin binding site
this allows myosin head to bind w actin

Question 9

when calcium arrives …

Answer 9

tropononin which moves the position of tropomyosin to uncover binding site, myosin head binds w actin

Question 10

sarcolemma

Answer 10

excitable cell membrane