Nervous system

• What does the nervous system consist off?


  The nervous system consists of the brain, spinal cord, and nerves.
• What does the peripheral nervous system consist of?

  1. sensory motor
  2. motor division
  3. somatic nervous system
  4. autonomic nervous system
• What are neutrons?

  send signals
• What the major cells in the nervous system?

  1. Neutron
  2. ependymal
  3. astrocyte
  4. microgila
  5. oligodendrocyte

  
• What does astrocyte cells do in the nervous system?

  Exachange materials between neutrons and capillaries
• What does microgila cells do in the nervous system?

  Microglia cells are responsible for immune defense and maintenance of brain homeostasis in the nervous system.
• What does the ependymal cells?


  Ependymal cells line the ventricles of the brain and spinal cord and produce cerebrospinal fluid.
• What does oligodendrocyes do in the nervous system?

  Oligodendrocytes produce myelin, which insulates and speeds up the transmission of electrical signals in the nervous system.
• What are scheann cells?

  Schwann cells are a type of glial cell that provide support and insulation to neurons in the peripheral nervous system.
• What is nervous system?

  System that controls signals in the body

  
• what does the axon do in the nervous system?

  Transmits electrical signals.
• What is the resting potential of the nervous system?

  -70 millivolts
• What neutrons are outside the nervous system?

  Sodium postive
• What neutrons inside the nervous system?

  Potassium negative
• What is the process of action potential?

  1. Sodium enters, making the Na+ more positive thersehold at -55mv
  2. This DEPLORIZATION Na goes to -40mv
  3. Replorization starts when the voltage gated patassium enters
  4. Hyerploizations ka leaves the membrane becoming negative
  5. Resting potiental when ka and na at its resting potianial
• action potential

  Diagram

  
• What is refractory period in the nervous system?

  Recovery period Can’t respond to any stimulus in the process of nervous system
• what are the types of channels?

  1. leak channels
  2. voltage gated channels