Week 5

Question 1

1. A neurone may be classified functionally as a/an
   a) bipolar neurone
   b) motor neurone
   c) multipolar neurone
   d) unipolar neurone

Answer 1

b) motor neurone

Question 2

2. Which of the following statements relating to a sodium potassium pump in the cell
   membrane of a neurone is correct?
   a) It acts to increase the negative charge on the outer surface of cell membranes of
   resting neurones
   b) When open, it allows the diffusion of potassium ions into the cell
   c) It increases the concentration of potassium ions inside the cell
   d) During each cycle it pumps 2 sodium ions out of the cell

Answer 2

c) it increases the concentration of potassium ions INSIDE the cell

Question 3

In regards to action potentials, what is happening during the increase in voltage in the earlier stages of an action potential inside the neurone?

Answer 3

lots of sodium ions are entering the cell

Question 4

4. An oligodendrocyte is to the CNS as a/an …… is to the PNS
   a) fibrocyte
   b) chondrocyte
   c) Schwann cell
   d) erythrocyte

Answer 4

c) schwann cell

Question 5

5. The structure posterior to the pons is the
   a) 2nd ventricle
   b) 3rd ventricle
   c) lateral ventricle
   d) 4th ventricle

Answer 5

d) 4th ventricle

Question 6

6. Which of the following structures contain cerebrospinal fluid?
7. lateral ventricles 2. central canal of spinal cord
8. corpus callosum 4. cerebral aqueduct
9. synaptic bulb 6. pons

Answer 6

lateral ventricles (1), central canal of spinal cord (2) and cerebral aquedact (4)

Question 7

7. Damage to the ventral roots of a spinal nerve would have which effect?
   a) no effect
   b) loss of motor function in the area innervated by the spinal nerve
   c) loss of both motor & sensory function in the area innervated by the spinal nerve
   d) loss of sensory reception from the area innervated by the spinal nerve

Answer 7

b) loss of motor function in the area innvervated by the spinal nerve

Question 8

8. Which structure of the brain rests upon the anterior cranial fossa?
   a) Frontal lobe
   b) Occipital lobe
   c) Hypothalamus
   d) Cerebellum

Answer 8

a) frontal lobe

Question 9

10. Which of the following CNS structures performs conscious intellectual functions (e.g.
    reading) ?
    a) cerebral cortex
    b) pons
    c) cerebellum
    d) medulla

Answer 9

a) cerebral cortex