nervous system

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Across
  1. 2. also called the soma, is the spherical part of the neuron that contains the nucleus.
  2. 4. is the membrane that receives a signal (binds neurotransmitter) from the presynaptic cell and responds via depolarisation or hyperpolarisation.
  3. 6. is a group of neuron cell bodies in the peripheral nervous system.
  4. 7. are a type of glial cells of the peripheral nervous system that help form the myelin sheath around the nerve fibers
  5. 9. insulating layer, or sheath that forms around nerves, including those in the brain and spinal cord. It is made up of protein and fatty substances
  6. 11. s a chemical messenger that carries, boosts, and balances signals between neurons (also known as nerve cells) and target cells throughout the body
  7. 12. is a specialized area of membrane of the axon terminal that faces the plasma membrane of the neuron or muscle fiber with which the axon terminal establishes a synaptic junction.
  8. 14. are the central nodes of neural circuits, enabling communication between sensory or motor neurons and the central nervous system
  9. 15. refers to the axon endings that are somewhat enlarged and often club- or button-shaped.
  10. 17. one or more bundles of fibers forming part of a system that conveys impulses of sensation, motion, etc., between the brain or spinal cord and other parts of the body.
  11. 19. is the part of the peripheral nervous system associated with the voluntary control of body movements via skeletal muscles.
  12. 20. also called nerve fiber
  13. 22. a junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter.
  14. 23. a short branched extension of a nerve cell, along which impulses received from other cells at synapses are transmitted to the cell body.
  15. 24. are sensory neurons that carry nerve impulses from sensory stimuli towards the central nervous system and brain,
  16. 25. a gap in the myelin sheath of a nerve, between adjacent Schwann cells.
Down
  1. 1. receive a signal from the presynaptic terminal that triggers a change in the membrane potential of the neuron through the opening and closing of ion channels. ... Ionotropic receptors (Ligand-gated receptors) Metabotropic receptors (G-protein coupled receptors).
  2. 3. the complex of nerve tissues that control the activities of the body. Invertebrates comprise the brain and spinal cord.
  3. 5. is a coordinated neurologic and physiologic response facilitated by specialized nerves
  4. 8. another term for glia.
  5. 10. a thing or event that evokes a specific functional reaction in an organ or tissue.
  6. 13. is the basic working unit of the brain, a specialized cell designed to transmit information to other nerve cells, muscle, or gland cells.
  7. 16. This system is the primary mechanism in control of the fight-or-flight response.
  8. 18. one of two components that make up the nervous system of bilateral animals, with the other part being the central nervous system.
  9. 21. is a large granular body found in neurons.