NERVOUS SYSTEM

1. The apparatus used to record the electrical activity of a neuron

a. E E G b. E C G c. Sphygmomanometer d. Cathode ray Oscilloscope

2. The ‘giant axons’ were isolated from

a. Earth warm b. Hydra c. Squid d. Snail

3. Which of the following is true for a resting nerve cell membrane

a. The membrane is polarised b. Na+ ions are move on its outer surface

c. K+ ions are more on its inner membrane d. All these

4. Which of the following requires ATP

a. Na channels b. K+ channels c. Na+/K+ pump d. Cl- channels

5. Which of the following constitute Na+/K+ pump

a. Channel proteins b. receptor proteins c. Carrier proteins d. Na+ gate

6. The strength of stimulus influences

a. Speed of impulse transmission b. Frequency of action potentials

c . The speed of saltatory conduction d. All these

7. Saltatory conductions are found in

a. Giant axon b. Non-medullated nerve fibre c. Medullated nervefibre d. All

8. Speed of infulse conduction increases with

a. Increase in strength of stimulus b. Increase in temperature

c. Increase in pressure d. Decrease in temperature

9. The neurotransmitters in a cholinergic fibre is

a. Acetylcholine b. Nor epinephrine c. Morphine d. Nicotine

10. On the arrival of impulse at the pre-synaptic membrane

a. Ca+ channels open b. Na+ channels open

c. K+ channels open d. Na+/K+ pump activates

11. The release of synaptice vesicles to synaptic cleft is by

a. Diffusion b. Endocytosis c. Exocytosis d. None

12. Inhibitory transmittors cause

a. Depolarisation b. Repolarisation c. Hyperpolarisation d. All these

13. Glutamate is

a. Inhibitory neurotransmitter b. Excitery neurotransimitter c. Hallucinogen
d. A stimulant

14. Angel dust is an illicite drug which binds to

a. GABA receptors b. Inhibits MAO c. Glutamate receptors d. Inhibits serotonin

15. Strychnine blocks

a. Glutamate receptors b.Glycine receptors c. Opiate receptors d. None

16. GABA is a neurotransmitter of

a. Spinal nerves b. Neuromuscular junction c. Brain d. All

17. The uncontrolled muscle movements in Huntington disease is due to the defficiency of

a. GABA b. Glycine c. Glutarate d. Endorphins

18. Which of the following is not a derrivative of opium

a. Morhine b. Heroin c. Pethidine d. All these

19. Endorphines are

a. Derrived from opium b. Endogeneously produced morphine like compounds

c. a and b d. None

20. Which of the following is a natural painkiller of the body

a. Morphine b. Heroine c. Pethidin d. Enderophines


1 d 2 c 3 d 4 c 5 c 6 b 7 c 8 d 9 b 10 a 11 c 12 c 13 b 14 c 15 b 16 d 17 a 18 c 19 b 20 d