Module 5: The Nervous System

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Across
  1. 5. The state of a neuron when it is at rest and capable of generating an action potential.
  2. 6. Nerves that carry information from the brain and spinal cord to your muscles and glands for that they can take action.
  3. 7. The part of the autonomic nervous system that arouses the body to deal with perceived threats. fight or flight. INCREASES -Size of pupils, breathing, heart rate, adrenaline, relaxes bladder
  4. 11. A fluid filled gap between each neuron.
  5. 12. The division of the peripheral nervous system that controls the body's skeletal muscles. VOLUNTARY movement (walking, eating, typing, etc)
  6. 13. The extensions of a neuron through which neural impulses are sent.
  7. 15. The branching extensions of a neuron that receive information and conduct impulses toward the cell body (soma).
  8. 18. They are a chemical messenger that travels across the synapse from one neuron to the nest and influences whether a neuron will generate an action potential.
  9. 20. An inhibitory neurotransmitter in the brain that plays a crucial role in calming and relaxing the body.
  10. 21. A neurotransmitter effect that makes it less likely that a receiving neuron will generate an action potential or "Fire"
  11. 22. The division of the peripheral nervous system that controls the glands and muscles of the internal organ; its subdivisions are the sympathetic (arousal) division and the parasympathetic (calming) division.AUTOMATIC (breathing, heart beating, digestion, etc)
  12. 23. One of the body's two communication systems; a set of glands that produce hormones, chemical messengers that circulate blood.
  13. 26. A neurotransmitter that enables learning and memory and also triggers muscle contraction
  14. 27. The part of the nervous system that contains the brain and the spinal cord.
  15. 28. A neurotransmitter effect that makes it more likely that the receiving neuron will generate an action potential or "Fire"
  16. 29. This contains the cell's nucleus and the other parts that keep the cell healthy and functioning
  17. 30. Covers the axon and speeds up the transmission of information.
Down
  1. 1. The principle stating that if a neuron fires, then it always fires at the same intensity; all action potentials have the same strength.
  2. 2. Nerve cells in the brain and spinal cord responsible for processing information. You have billions of these
  3. 3. A neural impulse; a brief electrical charge that travels down the axon of a neuron.
  4. 4. Neurotransmitters that are produced in the brain and released when the body experiences pain or stress. - Your body's natural pain killer.
  5. 8. The part of the autonomic nervous system that calms the body. It brings you down like a parachute. DECREASES heart rate, slows breathing, allows digestion, contracts bladder
  6. 9. The end point of a neuron where neurotransmitters are stored.
  7. 10. After the action potential goes off there is a brief pause for the neuron. Where it needs to recharge before it can send another impulse.
  8. 14. A neurotransmitter associated with movement, attention and learning and the brain's pleasure and reward system.
  9. 16. A neurotransmitter that affects mood, hunger, sleep and arousal. Undersupply linked to depression.
  10. 17. Nerves that carry information from the sense receptors to the spinal cord and brain.
  11. 19. Produces the myelin sheath.
  12. 24. This contains the instruction of the neuron and keeps it functioning.
  13. 25. The part of the nervous system that contains the sensory and motor nerves that connect the brain and the spindle cord to the rest of the body.