Organisation of the nervous system 11

• CNS consist of what?

  Brain, spinal cord.
• Tropic means "turn". Tropic are hormones that stimulate glands to make other hormones.
• Trophic means "nourishment". They are factors that stimulate growth of other cells.
• What nervous system does internal structure go into?

  Autonomic Nervous Systems
• What nervous system do superficially located structures go into?

  Somatic nervous structures
• What do afferent neurons do?

  The periphery (body) to the CNS (carry into)
• What do Efferent neurons do?

  Opposite direction to afferent. From CNS to periphery (carry info to body part).
• CNS nerve cell bodies are located in what group structures?

  Nuclei or Feilds
• PNS nerve cell bodies are located in what group structure

  Ganglia
• Nerve tracts are bundles of axons that carry impulses from one part of the body to another.
• What does the nerve tract mean?

  A collection or grouping of nerve axons running together
• What is the Nucleus

  A collection or grouping of nerve cell bodies
• Sensory neurons are afferent neurons
• Motor neurons are efferent neurons
• Sensory neurons function is to transmit information from the sensory organs to CNS.
• Motor neurons transmit information from the CNS to the control muscles.
• Interneurons are only within the CNS
• Interneurons have two classes local interneurons or projection (or tract) interneurons.
• Local interneurons are over short distances. When there is only one nucleus in between the neurons.
• Long distance interneurons are when there are two more nucleus in between the neurons.
• Interneurons transmit information from one neuron to the next neuron
• Neuroendocrine cells release hormones into the blood supply to influence distant organs
• Neuroendocrine cells are in the CNS and almost every organ in the body.