Question

Distinguish between voluntary and involuntary muscles??

Answer 1

Voluntary muscles:
1. These are those muscles which are operated by our brain with our own wish.

Involuntary muscles:
1. These are those muscles which act without the knowlegde of us.
2. It is co ordinated by the spinal cord

Answer 2

Voluntary muscles:-

Voluntary muscles are those which are under conscious control, which means under the control of the somatosensory nervous system.

This includes the skeletal muscles that attach to the bones and skin. The skeletal muscles allow the body to move by contracting and relaxing against bones and skin. They also maintain posture in the body. They attach to bones by connective tissue called tendons.

Skeletal muscle cells are long cells that appear striated. They are also multinucleated.

The cells have several nuclei located in cytoplasm known as the sarcoplasm. The nuclei are found only on the edges of the cell.

Involuntary :-

Voluntary muscles are those which are under conscious control, which means under the control of the somatosensory nervous system.

This includes the skeletal muscles that attach to the bones and skin. The skeletal muscles allow the body to move by contracting and relaxing against bones and skin. They also maintain posture in the body. They attach to bones by connective tissue called tendons.

Skeletal muscle cells are long cells that appear striated. They are also multinucleated.

The cells have several nuclei located in cytoplasm known as the sarcoplasm. The nuclei are found only on the edges of the cell.

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The muscle cells are arranged into bundles of muscle fibers. These bundles of fibers are arranged lengthwise and surrounded by a sheath of connective tissue to form the muscle.

They have contractile units called sarcomeres which shorten causing the muscle to contract, and then lengthen causing the muscle to relax.

Actin and myosin proteins are arranged in a specific way to form these sarcomeres. It is the action of these proteins sliding past each other which brings about the contraction of the muscle. This is called the sliding filament theory of muscle contraction.

Contraction involves other proteins such as tropomyosin and troponin which works with the actin and myosin to bring about movement.

Individual sarcomeres are separated at the Z disc, which is the junction between different cells.

Skeletal muscle contains protein myofilaments that are aligned in a specific way.





The muscle cells are arranged into bundles of muscle fibers. These bundles of fibers are arranged lengthwise and surrounded by a sheath of connective tissue to form the muscle.

They have contractile units called sarcomeres which shorten causing the muscle to contract, and then lengthen causing the muscle to relax.

Actin and myosin proteins are arranged in a specific way to form these sarcomeres. It is the action of these proteins sliding past each other which brings about the contraction of the muscle. This is called the sliding filament theory of muscle contraction.

Contraction involves other proteins such as tropomyosin and troponin which works with the actin and myosin to bring about movement.

Individual sarcomeres are separated at the Z disc, which is the junction between different cells.

Skeletal muscle contains protein myofilaments that are aligned in a specific way.