Midterm Exam II for Blackboard

Midterm Exam II for Blackboard - Midterm Exam II Fall 2011...

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Midterm Exam II – Fall 2011 Matching: 2011: Match the question with the best answer. 1. Matching: 2011: Match the question with the best answer. Points: 10 Question Match the question with the best answer. Answer Match Question Items Answer Items A. - A. Moves toward M line during muscle contraction. A. Thin filament B. - B. Contains myosin heads which form cross-bridges. B. Thick filament C. - C. Region from Z disc to Z disc. C. Sarcomere D. - D. Allows action potential to reach sarcoplasmic reticulum. D. T tubules E. - E. Action potential's first contact upon reaching muscle fiber. E. Sarcolemma True/False: True or false? Disruptions to the nor. .. 2. True/False: True or false? Disruptions to the nor. .. Points: 2 Question True or false? Disruptions to the normal ionic concentrations on either side of the sarcolemma will make skeletal muscle contractions impossible. Answer True False True/False: 2011: True or false? Upon death, skeletal m. .. 3. True/False: 2011: True or false? Upon death, skeletal m. .. Points: 2 Question True or false? Upon death, skeletal muscles maintain tension (rigor) because no ATP is available to detach crossbridges. Answer True False True/False: True or false? Ultimately, the amount. ..
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4. True/False: True or false? Ultimately, the amount. .. Points: 2 Question True or false? Ultimately, the amount of force generated by a muscle is determined by the number of crossbridges formed. Answer True False Multiple Choice: When an action potential reaches the . .. 5. Multiple Choice: When an action potential reaches the . .. Points: 2 Question When an action potential reaches the neuromuscular junction it triggers the release of what substance that binds to the chemically gated channels on the skeletal muscle fiber? Answer A. sodium B. acetylcholine C. synaptic vesicle D. calcium Multiple Choice: Why is acetylcholine released at the . .. 6. Multiple Choice: Why is acetylcholine released at the . .. Points: 2 Question Why is acetylcholine released at the neuromuscular junction? Answer A. Because the action potential cannot continue across the synaptic cleft. B. Because chemically gated channels open on the end of the neuron. C. Because the myofiber is highly permeable to acetylcholine. D. Because the synaptic vesicles break down neurotransmitter in the synaptic cleft. Multiple Choice: Order the following events in the cor. .. 7. Multiple Choice: Order the following events in the cor. ..
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Points: 2 Question Order the following events in the correct sequence for activation of a resting motor unit: 1. Action potential travels down sarcolemma 2. Myosin heads pivot towards the M line 3. Synaptic vesicles release contents 4. Action potential travels down motor neuron 5. Calcium diffuses through channels on the saroplasmic reticulum 6. Acetylcholine diffuses across the synaptic cleft Answer A. 2,6,5,4,1,3
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Midterm Exam II for Blackboard - Midterm Exam II Fall 2011...

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