Unit 2 Neurons, Nervous, and Endocrine Systems

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Across
  1. 5. Nerve cell between the brain and spinal cord that communicates with the sensory and motor neurons
  2. 6. Increase activation of a neurotransmitter
  3. 8. Sends messages away from the cell body to other neurons
  4. 9. Receive messages from other cells
  5. 10. A nerve cell and the basic building block of the nervous system
  6. 11. Covers the axon of some neurons and helps speed up neural impulses
  7. 13. Chemical messenger inside the body that carries messages between neurons
  8. 17. Neurons that carry signals toward the central nervous system
  9. 19. Chemical messengers are secreted into blood, which carries them to organs and tissues
  10. 20. Inside neuron has a higher concentration of negatively charged ions than out
  11. 21. The system that chemically controls the various functions of cells, tissues, and organs
  12. 22. Neurons that send outgoing info from the brain and spinal cord to muscles and glands
Down
  1. 1. Based movements of those ions between the outside and inside of the cell
  2. 2. Nervous system that enables voluntary control of our skeletal muscles
  3. 3. Tips of axon branches
  4. 4. The nervous system that regulates key voluntary functions of the body
  5. 7. Small sacs where neurotransmitters are stored
  6. 12. Neurons that carry info from sensory receptors to the brain and spinal cord
  7. 14. Intersection between the axon tip of sending neuron and the dendrite or cell body of receiving neuron
  8. 15. Neurons that carry information away from the central nervous system
  9. 16. Neurotransmitter molecule is taken back into axon terminal
  10. 18. Decrease activation of a neurotransmitter