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Discussion

Cell size and cell number can be measured using

  • A.hemocytometer
  • B.coulter counter
  • C.petroff-hausser counting chamber
  • D.none of these

Answer: B

Correct answer: coulter counter

A Coulter counter draws cells through a narrow aperture across which a current flows. Each cell displaces electrolyte and causes a pulse of resistance - the number of pulses gives the count and the size of each pulse gives the cell volume. A haemocytometer counts but does not size.

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