F opening of the chemically gated sodium 0 channels g

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Unformatted text preview: of the above E. Answers 1 and 2 only. A. B. C. D. Score: Value 0% 0% 0% 0% 100% Feedback 0.5/0.5 10. Ca<sup>+2</sup> release Ca+2 is released into the sarcoplasm when an action potential stimulates the: Student Response Value A. sarcolemma B. T-tubules C. sarcoplasmic reticulum 0% 0% 100% D. myosin heads Feedback 0% Score: 0.5/0.5 11. Shifting of the troponin-tropomyosin complex. As a direct result of Ca+2 binding to troponin: Student Response 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. Value 0% 0% 0% Feedback Student Response D. Acetylcholine binds to post-synaptic receptors on the sarcolemma. E. Na+ moves across the sarcolemma into the muscle cell. F. Breakdown of ACh by AChase. G. Opening of the voltage-gated sodium channels. H. Opening of potassium channels. I. The troponin-tropomyosin complex shifts, exposing the active sites on actin. J. Uptake of ATP by the myosin heads. K. Attachment of actin-myosin crossbridges and swiveling of the myosin heads. Score: Value Feedback 0% 0% 0% 0% 0% 100% 0% 0% 0.5/0.5 12. spinocerebellar tract Which of the following tracts does not send impulses ultimately to the cerebral cortex? Student Response spinocerebellar tract A. Value 100% B. Fasciculus cuneatus and fasciculus gracilis C. spinothalamic tract D. both #2 and #3 0% 0% 0% Score: Feedback 0.5/0.5 13. series elastic elements The series elastic elements of a muscle are composed of the various connective tissues and proteins including the protein _____. A. myosin B. actin C. titin D. collagen Student Response Value 0% 0% 100% 0% E. elastin 0% Score: 0/0.5 14. basement membrane All epithelial cells have: Feedback Student Response A. microvilli B. cilia C. basement membrane Value 0% 0% 100% D. all of the above E. Answers 1 and 2 only. 0% 0% Score: Feedback 0.5/0.5 15. myosin head reset In order for myosin heads to detach from actin and reset, _____ must be available. A. Ca+2 B. ATP Student Response Value 0% 100% C. ADP and Pi D. ACh 0% 0% Score: Feedback 0.5/0.5 16. pons The brain center which mediates functions which are part voluntary and part involuntary is: Student Response thalamus hypothalamus substantia nigra basal nuclei E. pons Value 0% 0% 0% 0% 100% Feedback Student Response A. thoracic vertebrae Value 100% Feedback B. sternum 0% A. B. C. D. Score: 0.5/0.5 17. All ribs articulate with the: All ribs articulate with the: Student Response C. lumbar vertebrae D. Both answers 1 and 2 Score: Value Feedback 0% 0% 0.5/0.5 18. Impulse reaches the axon terminus 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 s...
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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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