GMS 6474 EXAM QUESTIONS WITH ANSWERS

GMS 6474 EXAM QUESTIONS WITH
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ANSWERS

During contraction muscle fibers fatigue at different
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rates. Type 1 fibers fatigue ______ due to their ______
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oxidative capacity. |\




last, low|\




last, high
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first, low|\




first, high - CORRECT ANSWERS ✔✔last, high
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The motor neuron releases this neurotransmitter into the
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post-synaptic cleft of the neuromuscular junction to |\ |\ |\ |\ |\ |\ |\



invoke an end-plate potential.
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Acetylcholine
Potassium
Nicotine
Calcium - CORRECT ANSWERS ✔✔Acetylcholine
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What is the role of Titan within muscle?
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,It allows for the rapid depolarization of the muscle cell
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It slows the electrical conduction through muscle cells
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It tethers myosin filaments to the Z-line
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It binds collagen. filaments to the M line
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It sequesters Ca++ within the muscle cell - CORRECT
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ANSWERS ✔✔It tethers myosin filaments to the Z-line
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In skeletal muscle, when there is maximal load, the
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velocity of contraction equals 0. This is considered what
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type of contraction?
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Isotonic
Isometric
Lengthening
Shortening - CORRECT ANSWERS ✔✔Isometric |\ |\ |\ |\

, Duchenne Muscular Dystrophy (DMD) is characterized by
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the complete loss of which of the following muscle
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proteins?


Dystrophin
Actin
Myosin
Nebulin
Serca - CORRECT ANSWERS ✔✔Dystrophin
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With respect to muscle physiology, after binding, the
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myosin pulls on actin towards the M line and supersedes
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it. This causes the release of Pi as filaments are pulled
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together and move towards the H zone, which results in
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contraction of the muscle. Which of the following best|\ |\ |\ |\ |\ |\ |\ |\ |\



describes this step of contraction? |\ |\ |\ |\




Dissociation
Activation
Termination
Power Stoke |\




Binding - CORRECT ANSWERS ✔✔Power Stoke
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