Nervous System

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Across
  1. 2. the electrical potential of a neuron or other excitable cell at rest, or when it is not being stimulated or involved in passage of an impulse.
  2. 6. bundles of fibers that transmit signals in the form of electrical impulses around the body.
  3. 8. a branched extension of a neuron that acts to conduct the electrical stimulation received from other neural cells to the cell body, or soma, of the neuron from which the dendrites project.
  4. 10. the change in electrical potential associated with the passage of an impulse along the membrane of a muscle cell or nerve cell.
  5. 12. one of the two main divisions of the autonomic nervous system (the other being the sympathetic nervous system).
  6. 13. an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals.
  7. 14. the part of the nervous system that refers to the complex of nerve tissues that controls the activities of the body.
  8. 16. the largest part of the brain. It's responsible for higher brain functions, including thinking, learning, emotion, and conscious perception, such as sight, sound, and touch.
  9. 17. the part of the brain that connects the cerebrum with the spinal cord.
  10. 18. a part of the autonomic nervous system that prepares the body for action in threatening situations, often referred to as the "fight or flight" response.
  11. 20. a type of cell membrane protein that uses energy to pump three sodium ions out of the cell and two potassium ions into the cell.
  12. 21. a long, slender projection of a nerve cell, or neuron, that typically conducts electrical impulses away from the neuron's cell body.
Down
  1. 1. the individual bones that interlock with each other to form the spinal column, which is part of the body's skeletal system.
  2. 3. a chemical substance that is released at the end of a nerve fiber by the arrival of a nerve impulse.
  3. 4. The motor division of the nervous system, also known as the efferent division, is responsible for transmitting information from the central nervous system to the rest of the body.
  4. 5. a long, thin, tubular structure made up of nervous tissue, which extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column.
  5. 6. an electrical signal that travels along an axon. This is the primary way that neurons send signals to communicate with each other and with other cells in the body.
  6. 7. is responsible for carrying sensory information from the body to the central nervous system.
  7. 9. the junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter.
  8. 10. a part of the nervous system that controls and regulates the internal organs without any conscious recognition or effort by the individual.
  9. 11. atoms or molecules that have gained or lost one or more electrons, giving them a positive or negative charge.
  10. 14. a part of the brain that plays a vital role in motor control. It also contributes to functions such as attention and language, and in regulating fear and pleasure responses.
  11. 15. the part of the nervous system that refers to all the parts of the nervous system outside of the brain and spinal cord.
  12. 19. the endpoint of a neuron where neurotransmitters are stored.
  13. 20. a part of the peripheral nervous system, which is responsible for carrying sensory and motor information to and from the central nervous system.