Breakdown of ach by achase opening of the voltage

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: es across the sarcolemma into the muscle cell. Breakdown of ACh by AChase. Opening of the voltage-gated sodium channels. Opening of potassium channels. The troponin-tropomyosin complex shifts, exposing the active sites on actin. J. Uptake of ATP by the myosin heads. Score: 0.67/0.67 10. Which event, required for continued function of the neuromuscular junction, is prevented by certain pesticide and nerve gas poisons? Student Response Value A. Calcium ions enter the axon B. C. D. E. F. Calcium ions are pumped back into 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. Breakdown of ACh by AChase. 0% 0% 0% 0% 100% G. H. I. J. K. Opening of the voltage-gated sodium channels. Opening of potassium channels. The troponin-tropomyosin complex shifts, exposing the active sites on actin. Uptake of ATP by the myosin heads. Attachment of actin-myosin crossbridges and swiveling of the myosin heads. Correct Answer 0% 0% 0% 0% 0% 0% Score: 0/0.67 11. As soon as Ca++ ions are released into the sarcoplasm: A. B. C. D. E. F. G. H. Student Response Calcium ions enter the axon Calcium ions are pumped back into 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. Opening of the voltage-gated sodium channels. Opening of potassium channels. I. Binding of calcium ions to Troponin C. Value 0% 0% 0% 0% 0% 0% 0% 0% 100% J. Uptake of ATP by the myosin heads. K. Attachment of actin-myosin crossbridges and swiveling of the myosin heads. 0% 0% Score: Correct Answer 0.66/0.66 12. Curare acts as a muscle relaxant by competing with this process: A. B. C. D. Student Response Calcium ions enter the axon Calcium ions are pumped back into the sarcoplasmic reticulum. Acetylcholine is released into the synaptic cleft by exocytosis. Acetylcholine binding to post-synaptic receptors on the sarcolemma. Value 0% 0% 0% 100% E. Na+ moves across the sarcolemma into the muscle cell. F. Breakdown of ACh by AChase. 0% 0% G. H. I. J. 0% 0% 0% 0% Opening of the voltage-gated sodium channels. Opening of potassium channels. The troponin-tropomyosin complex shifts, exposing the active sites on actin. Uptake of ATP by the myosin heads. Correct Answer Student Response K. Attachment of actin-myosin crossbridges and swiveling of the myosin heads. Score: Value Correct Answer Value Correct Answer 0% 0/0.66 13. An action potential is generated on the sarcolemma by which event of the following: Student Response A. Calcium ions enter the axon 0% B. C. D. E. F. G. Calcium ions are pumped back into 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 out of the m...
View Full Document

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.

Ask a homework question - tutors are online