internal organization of muscle fibers

Question 1

each muscle Is made of 1000 protein strings called

Answer 1

myofibrils

Question 2

each myofibrils contain 3 types of protein called filaments what are they ?

Answer 2

actin filament
myosin filament
titin filament

Question 3

thin filament

Answer 3

actin filament

Question 4

thick filament

Answer 4

myosin filament

Question 5

elastic filament

Answer 5

titin filament

Question 6

three filaments form a repeating pattern of fibers called

Answer 6

sarcomere

Question 7

dark band due to presence of both myosin and actin

Answer 7

A band

Question 8

boundaries of the sarcomere where actin filaments are joined together forming a zigzag line

Answer 8

Z lines

Question 9

region in center of A band where only myosin is present

Answer 9

H zones

Question 10

the isotropic band an area of actin filament next to the z line

Answer 10

I band

Question 11

light band due to presence of only actin

Answer 11

I band

Question 12

the A and I bands create a what kind of appearance in skeletal and cardiac muscle

Answer 12

striped or striated