Question

The diagram given below represents the histology of a striped muscle. Label the parts $A,B,C,D,E$ and $F$.

• A. A - Sarcoplasm, B - Nucleus, C - Sarcolemina, D - Myofibril, E - Dark band, F - Light band
• B. A - Sarcoplasm, B - Light band, C - Myofibril, D - Sarcolemma, E - Nucleus, F - Dark band
• C. A - Light band, B - Sarcoplasm, C - Myofibril, D - Sarcolemma, E - Nucleus, F - Dark band
• D. A - Sarcolemma. B - Nucleus, C - Dark band, D - Light band, E - Sarcoplasm, F -Myofibril

Answer 1

Answer: (C)

A - Light band, B - Sarcoplasm, C - Myofibril, D - Sarcolemma, E - Nucleus, F - Dark band

A- Light band present on the myofibril is called I- band or isotropic band. It consists of only actin filaments.

B- Sarcoplasm is enclosed by sarcolemma which contains many nuclei.

C- Myofibril is made up of two types of myofilaments which are thick and thin.

D- Sarcolemma is the plasma membrane of muscle fibre.

E- Nucleus

F- Dark band present on the myofibril is called A- band or anisotropic band.

So, the correct answer is 'A- light band, B- sarcoplasm, C- myofibril, D- sarcolemma, E- nucleus, F- dark band'.