ZOO Ch. 10, 11, 12 self quizzes.docx

The greater the frequency of stimulation the weaker

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Factors that contribute to muscular strength include all of the following, EXCEPT? The greater the frequency of stimulation, the weaker the muscle contraction 45. Skeletal muscle is called__, because it is usually subject to conscious control? Voluntary 46. The following are types of myofilaments, EXCEPT? Myoglobin 47. Which microfilaments work together to shorten the muscle during muscle contraction? Myosin and actin 48. Which of the following is predominately made up of myosin? The thick filament 49. How many muscle fibers stimulate one somatic motor neuron? 0 50. (red ropes) What is the name of the structure indicated by the arrow in the accompanying figure? Troponin 51. NMJ
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52. Ch.12 quizzes----------------------------------------------------------------------------------------------------------- 1. In which part of a neuron is the postsynaptic membrane usually found? Dendrite 2. The __ division carries signals to the smooth muscle in the large intestine? Visceral motor 3. What would be the best explanation for why myelinated fibers conduct signals faster than unmyelinated fibers? Diffusion of ions along the axoplasm is faster 4. What is another name for the autonomic nervous system? Visceral motor division 5. The short range in voltage in a nerve cell is called? Local potential Red ropes Different types of muscles Sarcomere
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6. (neuron) Referring to the following diagram, what is the function of the structured labeled A? primary sited for receiving signals from other neurons 7. Which cells form myelin in the spinal cord? Oligodendrocytes 8. What occurs during hyperpolarization of a neuron membrane? Potassium ions are leaving the cell 9. Acetylcholine excites skeletal muscle? True 10. Which glial cell is found wrapped around nerve fibers in the PNS? Schwann cells 11. In the PNS nerve fiber regeneration, how is a growing axon directed to its original destination? It grows within the regeneration tube 12. In patients with multiple sclerosis, which neuroglia deteriorate? Oligodendrocytes/ myelin sheaths made by oligodendrocytes 13. What is the most common inhibitory neurotransmitter in the brain? Y-aminobutyric acid (GABA) 14. Gliomas are the most deadly of all the brain tumors. Why? Blood-brain barrier decreases effectiveness of chemotherapy 15. Memories are formed by neural pathways of modified synapses? True 16. In an action potential, which event directly follows repolarization? Hyperpolarization of the membrane 17. In order to regenerate, a peripheral nerve fiber must have which of the following? The neurosoma and at least some neurilemma intact 18. A cholinergic synapse uses__ as its neurotransmitter? Acetylcholine 19. What is the cause of the symptoms observed in patients with Parkinson Disease? Degeneration of dopamine-releasing neurons 20. Select the correct response with respect to myelination. A myelin sheath is formed by__ in the peripheral nervous system. A myelin sheath is formed by __in the central nervous system? Schwann cells/ oligodendrocytes 21. Oligodendrocytes serve the same purpose in the CNS that satellite cells do in the PNS?
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  • Fall '08
  • Staff
  • Muscle fascicle, muscle paralysis, Dr. Kandalepas

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