nervous system

• what do dendrites and dendrons do?

  carry impulses towards the cell body (axons carry them away)
• what is a mylein sheath?

  it surrounds axon, they act as an electrical insulator, speeding up the electrical impulse
• what do the cell body of the neurone have?

  has extensions that connect to other neurones
• in terms of neurones, how does the size affect the speed of an impulse?

  1 long neurone is much quicker than many short ones joined together
• what is the structure of a sensory neurone?

  1 long dendron carries nerve impulses from receptor cells to the cell body which is located in the middle of the neurone, 1 short axon carries nerve impulses from the cell body to the CNS
• what is the structure of a sensory neurone?

  many short dendrites carry nerve impulses from the CNS to the cell body. 1 long axon carries nerve impulses from the cell body to the effector cells
• what is the structure of a relay neurone?

  many short dendrites carry nerve impulses from sensory neurones to the cell body. An axon carries nerve impulses from the cell body to motor neurones
• which neurone has this structure: 1 long dendron carries nerve impulses from receptor cells to the cell body, which is located in the middle of the neurone. 1 short axon carries nerve impulses fro, the cell body to the CNS

  sensory
• which neurone has this structure: many short dendrites carry nerve impulses from the CNS to the cell body. 1 long axon carries nerve impulses from the cell body to the CNS

  motor
• which neurone has this structure: many short dendrites carry nerve impulses from sensory neurones to the cell body. An axon carries nerve impulses from the cell body to motor neurones

  relay