Question

Read the following statements
i) Muscle fibres are cylindrical and multinucleated
ii) They contract quickly and easily get fatigued
iii) They are seen attached to skeleton
iv) Skeletal muscle fibre is a syncitium
Of the above statements how many are true about skeletal muscle
1) three are true
2) only two are true
3) four are true
4) all are true​

Answer 1

Answer:

Skeletal muscle fibers are cylindrical, multinucleated, striated, and under voluntary control. Smooth muscle cells are spindle shaped, have a single, centrally located nucleus, and lack striations. They are called involuntarymuscles.

• Skeletal muscle contains muscle fibers, composed of myofibrils. They are made up of sarcomeres which have myosin and actin filaments. The rapid contractions in the skeletal muscles occur due to the voluntary signals to the motor neuron which innervates the muscle fibers

Answer 2

The correct answer will be option 4- all are true.

i) Skeletal muscle fibers are cylindrical and multinucleated.

ii) They contract quickly and easily get fatigued. Skeletal muscles undergo aerobic respiration while contractions, but in anaerobic conditions, they tend to get fatigued.

iii) They are seen attached to the skeleton and therefore are called skeletal muscles.

iv) Skeletal muscle fiber is a syncytium.