Chapter 12.2 Neurons

Edit Answers
1234567891011121314151617181920212223242526272829303132333435
Across
  1. 4. a synapse using gap junctions; contains no synaptic delay
  2. 7. membrane of the axon
  3. 13. synaptic ___; cavities housed in knobs that emit neurotransmitters
  4. 14. cytoplasm within the axon
  5. 15. plasma membrane of a neuron
  6. 18. axon ___; the part where the axon connects to the soma
  7. 19. the long, myelinated portion of the neuron that sends signals out
  8. 20. ___ substance; made of ribosomes
  9. 22. axon terminals at the ends of axon collaterals
  10. 23. a neuron with one process extending from cell body
  11. 26. a neuron with dendrites but no axon
  12. 27. a large CNS glial cell that produce the myelin sheath around axons
  13. 28. after fetal development, most neurons lose mitotic activity
  14. 30. layers of membranes from glial cells; high content of smooth lipids provide electrical insulation; neurolemmocytes and oligondendrocytes
  15. 31. release of a neurotransmitter in response to conductive activity
  16. 34. a neuron with one dendrite and one axon; ex. the retina
  17. 35. place where a neuron connects to another neuron or an affector
Down
  1. 1. a neuron with many dendrites and one axon; the most common type of neuron
  2. 2. star-shaped CNS glial cells with perivascular feet; help form blood-brain barrier
  3. 3. ___ cells; PNS glial cells arranged around ganglion that insulate and support exchange of nutrients and waste
  4. 5. axon ___; a branch of an axon
  5. 6. association neurons that receive, process, and integrate information
  6. 8. the process of wrapping axons in myeline
  7. 9. any of four types of mitotic, non-excitable support cells; as many of these as neurons; protect, nourish, and physically support neurons
  8. 10. a synapse with a synaptic cleft; uses neurotransmitters
  9. 11. phagocytic CNS glial cells that wander CNS to fight infection
  10. 12. responsiveness to stimulus
  11. 16. ___ cells; also called neurolemmocytes; elongated, flat PNS glial cells that produce myelin sheath for PNS axons
  12. 17. ability to propagate an electrical signal
  13. 21. a trait of neurons related to its lifespan; "extreme"
  14. 24. synaptic ___; small fluid-filled gap between two neurons; causes a delay in communication
  15. 25. cell body of a neuron
  16. 29. a CNS glial cell that is part of the choroid plexus; lines cavities of brain and spine to secrete cerebrospinal fluid (CSF)
  17. 32. the short, unmyelinated portion of the neuron that receives signals from other neurons
  18. 33. synaptic ___; the tips of telodendrions; also called terminal boutons