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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</p> Signup and view all the answers

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

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

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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Description

This quiz covers the use of pipettes and hemocytometers in laboratory settings to measure volumes of liquid and count cells. It also covers the concept of dilution factor.