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Acetylcholine is released into the neuromuscular junction by the axon terminal
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∙ 11y ago
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What are the structures within the muscle fiber that shorten to cause skeletal muscle fiber contraction?
Myofibrils
The repeating unit of a skeletal muscle fiber is the?
Myofibrils The sarcomere is the unit of muscular contraction.
A skeletal muscle fiber contains many nuclei?
Skeletal muscle fibers contain numerous nuclei. This is used to produce large amounts of the enzymes and structural proteins needed for muscle contraction.
Does a skeletal muscle fiber contain many nuclei?
Skeletal muscle fibers contain numerous nuclei. This is used to produce large amounts of the enzymes and structural proteins needed for muscle contraction.
What is the advantage of having many nuclei in a skeletal muscle fiber?
The ability to produce large amounts of the enzymes and structural proteins needed for contraction.
What is the multinucleate muscle fiber?
Skeletal
What do you call a shortening of muscle fiber?
contraction
How does blocking the activity of acetylcholinesterase affect skeletal muscle?
Acetylcholine release is necessary for skeletal muscle contraction, because it serves as the first step in the process, enabling the subsequent cross-bridge formation. A muscle's ability to contract depends on the formation of cross-bridges between myosin & actin filaments. A drug that blocks acetylcholine release would interfere with this cross-bridge formation and prevent muscle contraction
How relaxation in a skeletal muscle fiber occurs?
Relaxation of a skeletal muscle usually involves the Golgi tendon proprioceptors.
Most skeletal muscles contain?
muscle fiber
What describes the events of contraction in excitation-contraction coupling?
cross bridge formation "Excitation-contraction coupling" connects muscle fiber excitation to the muscle fiber contraction (cross bridge formation). During contraction, myosin heads form cross bridges many times-with each cross bridge generating a small amount of tension in the muscle fiber.
A specialized cell found in a skeletal muscle is called a muscle fiber?
true
