CHAPTER ELEVENPRACTICE QUIZ

  1. The two principal divisions of the nervous system are the central nervous system and the ______nervous system.
  1. The period of time in which an excitable cell cannot generate another action potential is called the ______period.
  1. The central nervous system contains the ______and the ______.
  1. ______neurons carry nerve impulses from receptors toward the central nervous system.
  1. The “rest and digest” division of the autonomic nervous system is actually called the ______division.
  1. The neuroglia that produce the myelin sheath in the CNS are the ______.
  1. The nucleus of the neuron is located within the ______of the neuron.
  1. Clusters of rough endoplasmic reticulum are commonly called ______.
  1. Nerve impulses arise in an area called the “trigger zone” of the ______.
  1. Synaptic vesicles store ______.
  1. Nerve impulses are received and conducted toward the cell body by ______.
  1. The effectors for general somatic efferent neurons are ______.
  1. Nerve cell bodies in the PNS generally are clustered together to form a ______.
  1. A neuron with one dendrite and one axon is classified as a (an) ______neuron.
  1. An ion channel that opens in response to direct changes in the membrane potential is called a ______-gated channel.
  1. Myelinated neurons make up ______matter and transmit impulses ______.
  1. The ion that rushes into the presynaptic axon terminal causing the release of the neurotransmitters by exocytosis is ______.
  1. Ion channels that are always open are called ______channels and are responsible for maintaining ______potential.
  1. The three functions of the nervous system are ______, ______, and ______.
  1. ______cells line the ventricles of the brain and are responsible for circulating CSF.
  1. The two “feel good” neurotransmitters secreted by the CNS are ______and ______.
  1. ______bring a neuron closer to the action potential threshold and are used to stimulate the axon hillock.
  1. ______summation occurs when a postsynaptic neuron is stimulated by several neurons at the same time.
  1. ______are an inhibitory peptide neurotransmitter that help to inhibit pain.
  1. Depolarization of a neuron occurs when which ion flows into the cell? ______
  1. Essentially all bipolar neurons are ______.
  1. Most multipolar neurons are ______, conducting impulses within the CNS.
  1. 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