Question

11.Which of the following muscles cells are spindle shaped?. 

Cardiac

Non-striated

Striated

Voluntary

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Answer 1

Answer:

Smooth muscle cells are spindle shaped, have a single, centrally located nucleus, and lack striations. They are called involuntary muscles. Cardiac muscle has branching fibers, one nucleus per cell, striations, and intercalated disks. Its contraction is not under voluntary control.

Answer 2

Answer:

b) Non-striated

Non-striated muscles or smooth muscle tissue are elongated and spindle shaped.

• Each of its fibre contains a single, oval nucleus surrounded by cytoplasm or sarcoplasm.

• Myofibrils in the cytoplasm are arranged longitudinally.

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Cardiac Muscle Tissue:-

• Each of its fibre is long and cylindrical.

• The fibres are uninucleate and have some lateral branches or oblique bridges.

• Cardiac muscles are striped, but have intercalated discs at intervals.

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Striated Muscle Tissue:-

• These muscles are also known as skeletal muscles or voluntary muscles.

• Each of its fibre is an elongated cell surrounded by a membrane, the sarcolemma.

• They are multinucleated.