NS3410-2012-quiz 6-KEY

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3410

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Mechanical Engineering

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Oct 30, 2023

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NS3410 Spring 2012 Quiz 6 - 3/28/12 EMAIL:______________________NAME:_____________________ Circle the correct answer or fill in the blank with the appropriate term (1 pt each). 1. All of the following changes occur during a muscle contraction EXCEPT: H zone gets smaller Zones of overlap get larger Z lines move closer together A band gets smaller Sarcomere length shortens 2. Vesicles containing acetylcholine fuse with the axon terminal in response to; A rise in intracellular Na + Voltage gated sodium channels Actions of the Na/K ATPase A rise in intracellular calcium Increased acetylcholinesterase 3. Order the structural components of a muscle from largest (1) to smallest (5); (0.2 pts each) 4__Myofilament 3__Myofibril 2__Muscle fiber 1__Fasicle 5__Actin 4. Which of the following processes requires ATP to function? Action potential propagation on myelinated axons Exocytosis Calcium movement back into the sarcoplasmic reticulum Voltage gated calcium channels 5. Red muscle fibers are fast oxidative fibers / fast glycolytic fibers / slow oxidative fibers. (circle correct answer) 6. White muscle fibers are fast oxidative fibers / fast glycolytic fibers / slow oxidative fibers. (circle correct answer)
7. A state of sustained skeletal muscle contraction is called ______________. Tetany, tetanus 8. The junctional folds of the motor end plate in a neuromuscular junction are rich in which of the following? Ligand gated channels Mechanically gated channels Voltage gated channels Calcium gated channels 9. Which of the circuits below contains oxygenated blood in veins: Pulmonary circuit Systemic Circuit Cardiac circuit 10. Which of the following coverings of the heart lines the chambers and valves of the cardiac muscle? (circle all that apply) Myocardium Epicardium Endocardium Parietal pericardium An extra point was added to everyone to compensate for Q10, as endocardium was not discussed in lecture prior to quiz
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