Nervous system 1

1.What the normal weight of adult human brain?

3 lbs / 1.5 kg

2. What is the percentage of water in the brain?

80%

3. Approximately how many neurons does the brain contain?

100 billion

 

4. Which cell is responsible for myelin sheath formation in the central nervous system?

Oligodendrocytes

5. Name the device used to measure brain waves.

Electroencephalograph

6. The Greek word for the branches of a tree gives us the name of what part of a neuron?

Dendrites

7. What is the specialized structure at the end  of an afferent nerve called?

Sensory receptor

8. Where do the first neurons carrying the sensations of fine touch and vibration end?

In the Gracile and Cuneate nuclei in the medulla oblongata of the same side

9. Name any two sensations that are carried in the dorsal column of the spinal cord.

Fine touch proprioception / vibration / stereognosis / tactile localization / tactile discrimination

10. What is inhibition of pain called?

Analgesia

11. Name the surgical procedure that destroys part of the basal ganglia and helps Parkinson’s patients.

12. Which part of the brain in the biological clock located?

Hypothalamus

13. Name the peptide that accumulates in the senile plaques of brains of Alzeheimer’s patients.

Beta amyloid

14. Which chromosome is altered to cause Huntington’s disease?

Chromosome four

15. Name a cognitive disorder associated with chronic alcoholism.

Korsakoff’s syndrome

16. The abbreviation, SPECT, stands for what brain imaging technique?

Single photon emission computed tomography

17. The abbreviation, fMRI, stands for what brain imaging technique?

Functional magnetic resonance imaging.

18. Which part of the central nervous system is considered as the head ganglion of the autonomic nervous system?

Hypothalamus

19. What is lack of sleep called?

Insomnia

20. What is the medical term for sleep walking?

Somnambulism

 ( UMS, 2008 )