Question

What is the name of the fundamental repeating unit of skeletal muscle fibre?

• A. Sarcoplasmic reticulum
• B. Motor unit
• C. Myosin cross bridge
• D. Sarcomere

Answer 1

The correct option is D Sarcomere

The fundamental repeating unit of skeletal muscle fibre is called sarcomere.
Motor unit is made up of a motor neuron and the muscle fibres it innervates.
As the myosin head binds with the actin filament, a connection called a cross bridge is formed.
The endoplasmic reticulum in muscle fibres is known as sarcoplasmic reticulum.