A) myofilament
B) myofibril
C) muscle fiber
D) muscle fasciculus
E) whole skeletal muscle
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A) are undifferentiated cells below the endomysium
B) can differentiate and divide into new functional muscle fibers
C) are stimulated by the destruction of existing muscle fibers
D) are stimulated by intensive strength training
E) all of the above are true of satellite cells
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A) recruitment.
B) tetanus.
C) the all-or-none response.
D) a motor unit.
E) the lag phase.
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A) The drug inhibits the production of the antibodies which the patient's immune system forms against ACh receptors.It thereby prevents the breakdown of ACh receptors so the muscle cells receive the normal contraction stimuli.
B) The drug increases the amount of acetylcholine released by the neuron,thereby increasing the chance that the few ACh remaining receptors on the muscle fiber membranes will bind ACh and receive the signal to contract.
C) The drug inhibits the activity of acetylcholinesterase,which prevents the breakdown of ACh.Consequently,ACh levels in the synapse remain elevated,thereby increasing the stimulation of the reduced number of functional ACh receptors.
D) The drug acts as an AP and signals the release of ACh.Consequently,ACh levels in the synapse remain elevated,thereby increasing the stimulation of the reduced number of functional ACh receptors.
E) The drug increases the activity of acetylcholinesterase.ACh is then broken down more quickly,thereby allowing a quicker signal cycle.
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A) is produced by the process of anaerobic respiration.
B) can replace ATP in binding myosin molecules during contraction.
C) acts as an energy reserve in muscle tissue.
D) is only formed during strenuous exercise.
E) causes the build up of lactic acid.
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A) is the neurotransmitter at the neuromuscular junction.
B) is broken down by acetylcholinesterase.
C) binds to receptors on the muscle cell membrane.
D) causes an influx of sodium ions into the muscle cell when bound to its receptor.
E) has all of these characteristics.
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A) The outside of the cell membrane would become more positively charged.
B) The cell would become more negatively charged.
C) The cell would become more positively charged.
D) The cell would depolarize.
E) The outside of the cell membrane would become more positively charged and the cell would depolarize are correct.
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A) lag
B) relaxation
C) contraction
D) refractory
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Correct Answer
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