A longitudinal sulcus b transverse sulcus c central

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Unformatted text preview: fibrous connective tissue D. dense irregular connective tissue 100% 0% 0% Score: 6. 0/0.5 Value Feedback 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 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: Value 100% Feedback 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0.5/0.5 7. Resting membrane potential Once an action potential is generated, another cannot be generated until the ion gates return to the following configuration: Student Response A. Na+ activation gate closed, Na+ inactivation gate open, K+ gate closed. B. Na+ activation gate closed, Na+ inactivation gate closed, K+ gate closed. + + C. Na activation gate open, Na inactivation gate + open, K gate closed. D. Na+ activation gate closed, Na+ inactivation gate closed, K+ gate open. Score: Value 100% Feedback 0% 0% 0% 0/0.5 8. inhibitory to heart The fibers which control the heart in the absence of stress come from the _____ portion of the CNS as part of the _____ division of the autonomic nervous system. Student Response A. cranial, parasympathetic Value 100% Feedback Student Response cranial, sympathetic B. 0% Value Feedback C. thoracic, parasympathetic D. thoracic, sympathetic 0% 0% Student Response A. eccrine sweat glands B. apocrine sweat glands C. sebaceous glands Value 0% 100% 0% Feedback D. Answers 1 and 3 E. both answers 2 and 3 0% 0% Score: 0/0.5 9. pheromomes Which of the following secretes pheromones? Score: 0/0.5 10. osteoclasts Osteoclasts are derived at some point from: Student Response mesenchyme cells monocytes osteoprogenitor cells all of the above E. Answers 1 and 2 only. Value 0% 0% 0% 0% 100% Feedback Student Response Value A. A stimulus which is broadly spread on the 0% body's soma. B. A stimulus of high intensity on the body's soma. 100% Feedback A. B. C. D. Score: 0.5/0.5 11. frequency summation High frequency stimuli result from: C. Many neurons functioning at the same time. D. Both #1 and #3. 0% 0% Score: 0.5/0.5 12. contraction trigger The trigger which causes vesicles of acetylcholine to move to the axon membrane and release ACh is: Student Response Value A. AChase +2 B. Ca 0% 100% C. Na+ D. K+ Feedback 0% 0% Score: 0.5/0.5 13. contractile elements In the structural hierarcy of a muscle, each cell is filled with contractile structures called: A. myofilaments B. myofibrils Student Response Value 0% 100% C. myofibers D. myosin 0% 0% Score: Feedback 0.5/0.5...
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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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