Skeletal Muscle Structure

Question 0

Myofibril made up of two types of protein filament …

Answer 0

Actin and Myosin

Question 1

Antagonistic

Answer 1

Work together, one contracts another relaxes

Question 2

Actin is

Answer 2

Thinner, 2 strands twisted

Question 3

Myosin Is

Answer 3

Thicker, long rod shaped fibres and bulbous heads

Question 4

Isotopic bands

Answer 4

Lighter, actin and myosin do not overlap

Question 5

Anisotropic bands

Answer 5

Darker, actin and myosin overlap

Question 6

H-zone

Answer 6

Centre of anisotropic band, lighter

Question 7

Z-line

Answer 7

Centre of isotopic band

Question 8

Sarcomere

Answer 8

Distance between adjacent z-lines

Question 9

Why are myofibrils arranged in a line?

Answer 9

All contract together and force generated in one direction

Question 10

Tropomyosin

Answer 10

Forms fibrous strand around actin filament, binds to actin binding site, moves when Ca2+ ions

Question 11

Troponin

Answer 11

Globular protein involved in contraction

Question 12

Myosin is made of two types of protein

Answer 12

1) fibrous protein

2) globular protein