Zoology · Locomotion and Movement

NEET (UG) 2023 — Question 148

Which of the following statements are correct regarding skeletal muscle?

A. Muscle bundles are held together by collagenous connective tissue layer called fascicle.

B. Sarcoplasmic reticulum of muscle fibre is a store house of calcium ions.

C. Striated appearance of skeletal muscle fibre is due to distribution pattern of actin and myosin proteins.

D. M line is considered as functional unit of contraction called sarcomere.

In the light of the above statements, choose the most appropriate answer from the options given below:

Answer: A

Option (1) is the correct answer because statements B and C are only correct statements while A and D

are incorrect statements.

Muscle bundles are held together by collagenous connective tissue layer called fascia. Muscle bundles

are called fascicles. The portion of the myofibril between two successive ‘Z’ lines is considered

as functional unit of contraction called sarcomere.

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