Q.Explain different type of muscles.

Striated muscles that are attached to the bones of the skeleton and bring about voluntary movements are called skeletal muscles.

Based on structure, muscles are classified as striated, unstriated (smooth), and cardiac. Skeletal muscles are a type of striated muscle — under the microscope their fibres show alternate light (I-band) and dark (A-band) bands due to the regular arrangement of actin and myosin filaments. They are usually attached to bones (via tendons) and help in body moveme …

Smooth muscle is involuntary and lines internal organs, so the answer is (C).

The three types of muscle:

• Skeletal (striated) muscle — attached to bones; voluntary (e.g. biceps).
• Smooth (unstriated) muscle — spindle-shaped cells in the walls of internal (visceral) organs such as the stomach, intestine, urinary bladder and blood vessels; involuntary.
• Cardiac muscle — in the heart; involuntary but striated. …

Skeletal muscle is voluntary in nature — it is controlled consciously by the will of the individual.

The body has three types of muscle tissue: skeletal (striated) muscle, smooth (unstriated) muscle, and cardiac muscle. Skeletal muscle is attached to bones via tendons and is responsible for locomotion and body movements that we consciously initiate — walking, lifting, writing — so it is classified as voluntary. This contrasts with smooth muscle (found in the wal …

The Palmaris longus is a long, narrow, spindle-shaped muscle of the forearm running from the elbow (medial epicondyle of the humerus) to the wrist/palm (palmar aponeurosis) — option (a).

The question describes a specific skeletal muscle by its shape and its attachment points (elbow to wrist), which is a landmark description used for the Palmaris longus:

• (a) Palmaris muscle (Palmaris longus): a long, narrow, often tendon-heavy muscle of the anterior forearm that arises near the elbow (medial epicondyle of the humerus) and runs down to insert into the palmar aponeurosis at the wrist. It matches the description exactly.
• (b) Cardiac muscle: found only in the heart wall, not a forearm muscle running elbow-to-wrist.
• (c) Smooth muscle: found in the walls of internal organs and blood vessels, not a discrete named forearm muscle of this kind. …