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Neurophysiology: Nervous System Structure and Function

Questions covering nerve conduction, brain anatomy, spinal cord function, and cerebral blood supply

5 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following statements regarding nerve conduction and synaptic integration is incorrect?

  1. The synaptic inputs are then associated with the postsynaptic cell.
  2. The action potential on entering the synapse causes the release of neurotransmitters.
  3. The binding of neurotransmitters with the pre and post synaptic membranes cause the change in membrane potential.
  4. In myelinated neurons, the action potential acts at node of Ranvier.
  5. Neurotransmitters gets activated at the synaptic junction.
Question 2 Multiple Choice (Single Answer)

Which of the following thalamic nuclei is most associated with the visual system?

  1. LGN nucleus
  2. MGN nucleus
  3. VAN nucleus
  4. MD nucleus
  5. VPL nucleus
Question 3 Multiple Choice (Single Answer)

Which of the following statements is incorrect regarding the regulation of calcium and phosphate?

  1. Parathyroid hormone stimulates osteoblasts.
  2. Vitamin D increases calcium absorption from the gut.
  3. Parathyroid hormone promotes phosphate excretion.
  4. Parathyroid hormone is released when there is fall in ionised calcium in the blood.
  5. Parathyroid hormone decelerates vitamin D production in the kidney.
Question 4 Multiple Choice (Single Answer)

Select the incorrect statement regarding the spinal cord.

  1. Sensory information on pain and temperature is delivered by the spinothalamic system.
  2. Sensory information is transmitted up the dorsal column system.
  3. The corticospinal tract is mainly implicated with regular distal motor control.
  4. The cervical spinal cord stimulates the arms.
  5. The spinal cord is highly organized with decending sensory pathways.
Question 5 Multiple Choice (Single Answer)

Which of the following does not characterise the blood supply of the central nervous system?

  1. The vertebrobasilar system which constitutes the anterior circulation.
  2. At the core of the brain, the arteries form the circle of Willis.
  3. Abnormalities of blood flow in the carotid arteries frequently leads to the problems in the cerebral hemisphere.
  4. Abnormalities of blood flow in the vertebral arteries frequently leads to the defects in brainstem, cerebellum and posterior parts of the brain.
  5. Thrombus and emboli are the chief causes of blood flow obstructions in the brain.
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