Student response a na and k b k and na c na and

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Unformatted text preview: f potassium channels. I. Binding of calcium ions to Troponin C. J. Uptake of ATP by the myosin heads. K. Attachment of actin-myosin crossbridges and swiveling of the myosin heads. Score: Value Correct Answer 0% 0% 0% 0% 0% 0% 0% 100% 0% 0% 0% 0/0.67 2. What is the next thing which happens after an impulse enters the T tubules? Student Response A. Calcium ions enter the axon B. Calcium ions enter the sarcoplasm from the sarcoplasmic reticulum. Value 0% 100% Correct Answer C. D. E. F. G. H. I. J. K. Score: Student Response Acetylcholine is released into the synaptic cleft by exocytosis. Acetylcholine binds to post-synaptic receptors on the sarcolemma. Na+ moves across the sarcolemma into the muscle cell. Opening of the chemically-gated sodium channels. Opening of the voltage-gated sodium channels. Opening of potassium channels. Binding of calcium ions to Troponin C. Uptake of ATP by the myosin heads. Attachment of actin-myosin crossbridges and swiveling of the myosin heads. Value Correct Answer Value 100% Correct Answer 0% 0% 0% 0% 0% 0% 0% 0% 0% 0.67/0.67 3. What is the first thing that happens when an impulse reaches the axon terminus of a neuromuscular junction? Student Response A. Calcium ions enter the axon B. Calcium ions enter the sarcoplasm from the sarcoplasmic reticulum. C. Acetylcholine is released into the synaptic cleft by exocytosis. D. Acetylcholine binds to post-synaptic receptors on the sarcolemma. E. Na+ moves across the sarcolemma into the muscle cell. F. Opening of the chemically-gated sodium channels. G. Opening of the voltage-gated sodium channels. H. Opening of potassium channels. I. Binding of calcium ions to Troponin C. J. Uptake of ATP by the myosin heads. K. Attachment of actin-myosin crossbridges and swiveling of the myosin heads. Score: 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0/0.67 4. As a result of threshold depolarization at the neuromuscular junction, what happens on the adjacent sarcolemma? Student Response Calcium ions enter the axon Calcium ions enter the sarcoplasm from the sarcoplasmic reticulum. Acetylcholine is released into the synaptic cleft by exocytosis. Acetylcholine binds to post-synaptic receptors on the sarcolemma. Na+ moves across the sarcolemma into the muscle cell. Opening of the chemically-gated sodium channels. G. Opening of the voltage-gated sodium channels. Value 0% 0% 0% 0% 0% 0% 100% H. I. J. K. 0% 0% 0% 0% A. B. C. D. E. F. Score: Opening of potassium channels. Binding of calcium ions to Troponin C. Uptake of ATP by the myosin heads. Attachment of actin-myosin crossbridges and swiveling of the myosin heads. 0.67/0.67 Correct Answer 5. As soon as Ca++ ions enter the axon: Student Response Value A. Calcium ions enter the axon B. Calcium ions are pumped back into the sarcoplasmic reticulum. C. Acetylcholine is released into the synaptic cleft by exocytosis. 0% 0% 100% D. E. F. G. H. 0% 0% 0% 0% 0% 0% J. Uptake of ATP by the myosin heads. K. Attachment of actin-myosin crossbridges and swiveling of the myo...
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This note was uploaded on 01/29/2013 for the course BIOL 239 taught by Professor Swan during the Fall '12 term at New Mexico.

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