When a skeletal muscle fiber contracts,which of the following does not occur?
A) The H bands and I bands get smaller.
B) The zones of overlap get larger.
C) The Z lines get closer together.
D) The width of the A band remains constant.
E) Myosin and actin filaments decrease in length.
Correct Answer:
Verified
Q35: Cross-bridges are portions of
A)actin molecules.
B)myosin molecules.
C)troponin molecules.
D)tropomyosin
Q49: Each skeletal muscle fiber is controlled by
Q51: Cellular membrane potential is measured in
A)milliseconds.
B)micrometers.
C)Hertz.
D)millivolts.
E)amperes.
Q54: The structural explanation of how a muscle
Q55: Which of the following is an ion
Q57: Membrane potential is
A)a chemical signal that has
Q58: The Na+/K+ ion pump is responsible for
A)diffusing
Q60: During the _ phase of action potential
Q61: Communication between axons and muscle fibers occurs
Q66: The narrow space between the synaptic terminal
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