Southeastern Louisiana University

ZOO 250

Ch.12 quiz

1)In which part of a neuron is the postsynaptic membrane usually found?

2. The        division carries signals to the smooth muscle in the large intestine?
3. What would be the best explanation for why myelinated fibers conduct signals faster than unmyelinated fibers?
4. What is another name for the autonomic nervous system?
5. The short range in voltage in a nerve cell is called?

6. (neuron) Referring to the following diagram, what is the function of the structured labeled A?
7. Which cells form myelin in the spinal cord?
8. What occurs during hyperpolarization of a neuron membrane?
9. Acetylcholine excites skeletal muscle?
10. Which glial cell is found wrapped around nerve fibers in the PNS?
11. In the PNS nerve fiber regeneration, how is a growing axon directed to its original destination?
12. In patients with multiple sclerosis, which neuroglia deteriorate?
13. What is the most common inhibitory neurotransmitter in the brain?
14. Gliomas are the most deadly of all the brain tumors. Why?
15. Memories are formed by neural pathways of modified synapses?
16. In an action potential, which event directly follows repolarization?
17. In order to regenerate, a peripheral nerve fiber must have which of the following?
18. A cholinergic synapse uses          as its neurotransmitter?
19. What is the cause of the symptoms observed in patients with Parkinson Disease?
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?
21. Oligodendrocytes serve the same purpose in the CNS that satellite cells do in the PNS?
22. Unmyelinated neurons conduct signals by?
23. In a myelinated fiber, only the initial segment in the trigger zone has voltage-regulated channels?
24. Some       neurons are specialized to detect stimuli, whereas              neurons send signals to the effectors of the nervous system?
25. Which of the following ions has the greatest influence on the resting membrane potential?
26. All of the following are typical characteristics of neurotransmitters EXCEPT?
27. When the voltage of a plasma membrane shifts from +35mV towards 0mV, the cell is?
28. A myelin sheath is composed primarily of?
29. What is the function of the sensory division of the peripheral nervous system?