Why does a skeletal muscle fiber have more than one nucleus?
A) During development, groups of embryonic cells called myoblasts fuse together to form a single muscle fiber.
B) During development, the nucleus of each myoblast replicates several times.
C) During development, the sarcolemmae of newly formed muscle fibers disintegrate, making many muscle cells into one.
D) During muscular activity, parts of each muscle fiber break down, and the remaining parts, including their nuclei, fuse into new combination fibers.
E) All of the answers are correct.
Correct Answer:
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Q15: Which of the following is a function
Q16: Skeletal muscle fibers arise from embryonic cells
Q17: The sarcoplasmic reticulum is (the)_.
A) sarcolemma of
Q18: The attachment of a muscle to a
Q19: Which of the following features is NOT
Q21: The neurotransmitter involved in the process of
Q22: The motor neuron releases acetylcholine, which then
Q23: Troponin assists in controlling the interaction between
Q24: Thick (myosin)and thin (actin)filaments together form _.
A)
Q25: The smallest functional units of the muscle
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