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Which of the following tissues is responsible for limb and body movement?
Epithelial tissue
Cardiac muscle
Smooth muscle
Skeletal muscle
Skeletal muscle
Skeletal muscle tissue is responsible for voluntary limb and body movement as it is directly attached to the skeletal system via tendons. These muscles are composed of striated muscle fibers that contract or relax in response to conscious control from the somatic nervous system.
Skeletal muscle tissue is responsible for voluntary limb and body movement as it is directly attached to the skeletal system via tendons. These muscles are composed of striated muscle fibers that contract or relax in response to conscious control from the somatic nervous system.
Think of your skeletal muscles like a pulley system in a crane, where the muscles act as the cables and motors that pull on the skeletal 'beams' to create movement.
S-V-S: Skeletal = Voluntary = Striated.
F=ma тАФ where force generated by the muscle causes skeletal acceleration (a)
W=F├Чd тАФ the work done by muscle contraction over a distance (d)
The sliding filament theory describes this movement. When an action potential reaches the neuromuscular junction, calcium ions are released, allowing myosin heads to bind with actin filaments. This creates cross-bridges that slide the filaments past each other, shortening the sarcomere (s=╬ФL) and generating force for contraction.
Skeletal muscles are multinucleated and striated in appearance.
They facilitate locomotion, posture maintenance, and heat production.
The functional unit of the muscle fiber is known as the sarcomere.
High force production
Precise voluntary control
Rapid contraction speeds
Prone to fatigue over long periods
Requires significant energy expenditure
Locomotion (walking, running)
Manipulation of objects using hands
Option A (Epithelial) forms protective linings, Option B (Cardiac) is involuntary and found only in the heart, and Option C (Smooth) is involuntary and located in internal organs (viscera).
D is correct тАФ Skeletal muscle is the only tissue type among the options that provides voluntary control over the movement of limbs and the body.
Remember: Cardiac and Smooth muscles are involuntary, while Skeletal muscle is the only type under conscious (voluntary) control, making it the primary mover for limbs.
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