sliding filament mechanism- contraction

Question 1

nerve impulses causes

Answer 1

depolarization of muscle fiber

Question 2

depolarization causes

Answer 2

myosin filaments to pull actin filaments toward the center of the sarcomere

Question 3

this pull of actin filaments makes

Answer 3

the sarcomere shorter

Question 4

all of sarcomeres shorten and

Answer 4

muscle fiber contracts