Nervous System Part 1

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Across
  1. 2. The type of neuron that connects sensory and motor neurons
  2. 4. This can change the resting membrane potential
  3. 8. Cells that form a myelin sheath in the PNS
  4. 12. A fatty coat of insulation around the axon of a neuron
  5. 14. Type of neuroglia that wraps around and destroys pathogens & debris in the CNS
  6. 17. Another name for the end of the neuron (dendrite) that detects changes in the internal & external environment
  7. 18. This type of matter is typically neuron cell bodies
  8. 20. The division of the nervous system that dominates when you are resting an ddigesting
  9. 22. A bundle of axons in the PNS
  10. 23. At rest, the inside of a axon is slightly ___________
  11. 24. The type of neuron that brings information into the back of the spinal cord
  12. 25. The division of the nervous system that tells skeletal muscles to contract
  13. 26. The minimum amount of stimulus needed to cause an action potential
  14. 29. The resting membrane _______________ is -70 mV
  15. 32. Type of neuroglia that the maintains the blood brain barrier to protect neurons
  16. 33. A group of neuron cell bodies in the CNS
  17. 34. The division of the nervous system that controls cardiac and smooth muscle and glands
  18. 36. Potassium ion (K+) leaves the cell and the voltage drops
  19. 37. The functional unit of the nervous system that is specialized to transmit an electrical signal
Down
  1. 1. There are usually many of the short extensions of neurons that detect stimuli
  2. 3. The sodium potassium pump sends three of these ions out with every turn
  3. 5. The end of an axon where neurotransmitters are located
  4. 6. The division of the nervous system that dominates when you are in a stressful situation
  5. 7. A group of neuron cell bodies in the PNS
  6. 9. There are typically few of these long extensions of neurons that transmit an action potential
  7. 10. The voltage becomes more negative than the resting membrane potential
  8. 11. This type of matter is typically myelinated axons
  9. 12. The division of the peripheral nervous system that controls effectors
  10. 13. A type of neuroglia that makes and circulates cerebrospinal fluid
  11. 15. The part of the nervous system that integrates and processes sensory input
  12. 16. Type of neuroglia that wraps around axons in the CNS
  13. 19. A group of different types of cells that support neurons
  14. 21. A stimulus causes voltage-gated sodium ion (Na+) channels to open and the voltage increases to +40 mV
  15. 27. Neuroglia that cushion & protect neuron cell bodies in the PNS
  16. 28. The location on an axon where a action potential begins
  17. 30. Another name for the muscle or gland that carries out the commands of the control center
  18. 31. A bundle of axons in the CNS
  19. 35. The type of nerves that branch out of the brain