A Petroff-Hauser Counting Chamber Is

question 30

Multiple Choice

A Petroff-Hauser counting chamber is

• A) a glass slide containing an etched grid for counting microbes directly using a microscope.
• B) a device that counts cells as they interrupt an electrical current.
• C) a device that measures the amount of light that passes through a culture.
• D) an apparatus that traps bacterial cells on a membrane filter where they can be counted.
• E) a device used to count numbers of bacterial colonies on a Petri plate.

---

Definitions:

Social Psychology

Analysis of how individuals' cognitions, emotions, and behaviors are shaped by the presence of others, whether it be actual, imagined, or hinted at.

Developmental Psychology

The branch of psychology that studies how people grow and change throughout the life span.

Basic Research

Research that focuses on a general understanding of basic principles that can be applied to many different problems

Applied Research

Research aimed at solving practical problems rather than acquiring knowledge for knowledge's sake.