Nervous System

• Which of the following cells form myelin sheaths in the peripheral nervous system?

  Schwann Cells
• Which of the following is not true of a Pacinian Corpuscle?

  1. It consists of a layered structure resembling an onion
  2. It is a slowly adapting receptor
  3. It is a rapidly adapting receptor
  4. They detect pressure
  5. They are found subcutaneously

  2
• Sensory neurons are

  1. afferent neurons
  2. take impulses to the CNS
  3. are efferent neurons
  4. take impulses away from the CNS
  5. Both A & B are correct

  5
• How many pairs of spinal nerves emerge from the spinal cord?

  31
• Starting from the top of the spinal cord in what order do the different regions of the cord occur?

  Cervical - thoracic - lumbar - sacral
• Which of the following is inaccurate?

  1. 8 pairs of c spinal nerves
  2. 12 pairs of thoracic spinal nerves
  3. 5 pairs of lumbar spinal nerves
  4. 5 pairs of sacral spinal nerves
  5. 5 pairs of coccygeal spinas nerve

  5
• The sensory receptors which participate in the knee jerk are

  Muscle receptors
• Arrange these in the correct sequence for a reflex arc:

  1. sensory neuron
  2. motor neuron
  3. integration centre
  4. effector
  5. receptor

  5 1 3 2 4
• What would be the normal latency ( time taken between hitting the patellar tendon and the response of the quadriceps) of the knee jerk reflex

  35ms