Laboratory Measurement Techniques

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Questions and Answers

What is the primary purpose of a hemocytometer?

  • To prepare a sample for microscopy
  • To dilute a sample
  • To count blood cells (correct)
  • To measure the volume of a liquid

What is a key feature of a hemocytometer?

  • It has a microscopic grid etched on the glass surface (correct)
  • It has a microscope attached to it
  • It can be used to measure pH levels
  • It has a single counting chamber

What does the dilution factor formula calculate?

  • The volume of the original sample
  • The concentration of the original sample
  • The ratio of the volume of the sample to the volume of the diluting fluid (correct)
  • The volume of the diluted sample

What is an advantage of using a pipette?

<p>It allows for precise and accurate measurement of liquid volumes (D)</p> Signup and view all the answers

What is the purpose of the microscopic grid on a hemocytometer?

<p>To count cells accurately (A)</p> Signup and view all the answers

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Study Notes

Laboratory Tools

  • Pipettes are used to measure volumes of liquid precisely and accurately.

Hemocytometers

  • Hemocytometers were developed for counting blood cells.
  • A hemocytometer has two counting chambers.
  • Each chamber has a microscopic grid etched on the glass surface.

Dilution Factor

  • The formula to calculate the dilution factor is: (Volume of sample + Volume of diluting fluid) / Volume of sample.

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