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CHAPTER ELEVEN
PRACTICE QUIZ
1. The two principal divisions of the nervous system are the central nervous system and the
_______________________________ nervous system.
2. The period of time in which an excitable cell cannot generate another action potential is called the
______________________ period.
3. The central nervous system contains the _____________ and the ___________________.
4. ____________________ neurons carry nerve impulses from receptors toward the central nervous system.
5. The “rest and digest” division of the autonomic nervous system is actually called the
___________________________________ division.
6. The neuroglia that produce the myelin sheath in the CNS are the ___________________.
7. The nucleus of the neuron is located within the ______________________ of the neuron.
8. Clusters of rough endoplasmic reticulum are commonly called _____________________.
9. Nerve impulses arise in an area called the “trigger zone” of the ____________________.
10. Synaptic vesicles store ____________________________________________________.
11. Nerve impulses are received and conducted toward the cell body by ________________.
12. The effectors for general somatic efferent neurons are ___________________________.
13. Nerve cell bodies in the PNS generally are clustered together to form a ______________.
14. A neuron with one dendrite and one axon is classified as a (an) ______________ neuron.
15. An ion channel that opens in response to direct changes in the membrane potential is called a
__________________-gated channel.
16. Myelinated neurons make up ____________ matter and transmit impulses ___________.
17. The ion that rushes into the presynaptic axon terminal causing the release of the neurotransmitters by
exocytosis is ____________________________.
18. Ion channels that are always open are called ______________________ channels and are responsible for
maintaining __________________________ potential.
19. The three functions of the nervous system are __________________________________,
__________________________________, and _________________________________.
20. __________________________ cells line the ventricles of the brain and are responsible for circulating CSF.
21. The two “feel good” neurotransmitters secreted by the CNS are ____________________ and
_______________________________.
22. ___________________________________ bring a neuron closer to the action potential threshold and are used
to stimulate the axon hillock.
23. __________________________ summation occurs when a postsynaptic neuron is stimulated by several neurons
at the same time.
24. ____________________ are an inhibitory peptide neurotransmitter that help to inhibit pain.
25. Depolarization of a neuron occurs when which ion flows into the cell? _________________________
26. Essentially all bipolar neurons are ____________________________.
27. Most multipolar neurons are ________________________, conducting impulses within the CNS.
28. Gaps in the myelin sheath in the PNS are called _____________________________.
Answers:
1. Peripheral
2. Refractory
3. Brain, spinal cord
4. Sensory/afferent
5. Parasympathetic
6. Oligodendrocyte
7. Soma
8. Nissl bodies
9. Axon hillock
10. Neurotransmitters
11. Dendrites
12. Skeletal muscles
13. Ganglion
14. Bipolar
15. Voltage
16. White, quickly
17. Ca+
18. Electrical synapses, resting membrane
19. Input, integration, motor output
20. Ependymal
21. Norepinephrine, dopamine
22. Excitatory postsynaptic potentials (EPSPs)
23. Spatial
24. Endorphins
25. Na+
26. Sensory neurons
27. Interneurons (association neurons)
28. Nodes of Ranvier