0 d acetylcholine binds to post synaptic receptors on

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Unformatted text preview: s as a muscle relaxant by competing with this process: Student Response Value A. Calcium ions enter the axon 0% B. Calcium ions are pumped back into the sarcoplasmic reticulum. 0% C. Acetylcholine is released into the synaptic cleft by exocytosis. 0% D Acetylcholine binding to post-synaptic receptors on the sarcolemma. . 100% E. Na+ moves across the sarcolemma into the muscle cell. 0% F. Breakdown of ACh by AChase. 0% G. Opening of the voltage-gated sodium channels. 0% H. Opening of potassium channels. 0% I. The troponin-tropomyosin complex shifts, exposing the active sites on actin. 0% J. Uptake of ATP by the myosin heads. 0% K. Attachment of actin-myosin crossbridges and swiveling of the myosin heads. 0% Score: 0.66/0.66 13. An action potential is generated on the sarcolemma by which event of the following: Student Response Value A. Calcium ions enter the axon 0% B. Calcium ions are pumped back into the sarcoplasmic reticulum. 0% C. Acetylcholine is released into the synaptic cleft by exocytosis. 0% D. Acetylcholine binds to post-synaptic receptors on the sarcolemma. 0% E. Na+ moves across the sarcolemma out of the muscle cell. 0% F. Opening of the chemically-gated sodium channels. 0% G. Opening of the voltage-gated sodium channels. 100% H. Opening of potassium channels. 0% Student Response Value I. Binding of calcium ions to Troponin C. 0% J. Uptake of ATP by the myosin heads. 0% K. Attachment of actin-myosin crossbridges and swiveling of the myosin heads. 0% Score: 0.66/0.66 14. What event causes depolarization of the sarcolemma at the neuromuscular junction? Student Response Value A. Calcium ions enter the axon 0% B. Calcium ions enter the sarcoplasm from the sarcoplasmic reticulum. 0% C. Acetylcholine is released into the synaptic cleft by exocytosis. 0% D. Acetylcholine binds to post-synaptic receptors on the sarcolemma. 0% E. Na+ moves across the sarcolemma out of the muscle cell. 0% F. Opening of the chemically-gated sodium channels. 100% G. Opening of the voltage-gated sodium channels. 0% H. Opening of potassium channels. 0% I. Binding of calcium ions to Troponin C. 0% J. Uptake of ATP by the myosin heads. 0% K. Attachment of actin-myosin crossbridges and swiveling of the myosin heads. 0% Score: 0.66/0.66 15. Which of the following binds calcium ions: Student Response Value A. sarcoplasmic reticulum 50% B. troponin C 50% C. myosin 0% D. all of the above 0% E 1 and 2, but not 3 . Score: 100% 0.66/0.66 Jump to Navigation Frame Your location: Assessments › View Attempt 2 of 2 View All Submissions › View Attempt Title: Quiz #5 - Stimulus-Contraction Coupling Started: March 24, 2008 2:42 PM Submitted: March 24, 2008 2:44 PM Time spent: 00:02:42 Total score: 10/10 = 100% Total score adjusted by 0.0 Maximum possible score: 10 1. What event causes repolarization of the sarcolemma? Student Response Value A. Calcium ions enter the axon 0% B. Calcium ions enter the sarcoplasm from the sarcoplasmic reticulum. 0% C. Acetylcholine is released into the synaptic cleft by...
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