Podcast
Questions and Answers
What is the term used to describe a well-organized community of bacteria that adheres to surfaces and is embedded in an extracellular slime layer?
What is the term used to describe a well-organized community of bacteria that adheres to surfaces and is embedded in an extracellular slime layer?
- Biofilm (correct)
- Bacterial colony
- Slime layer
- Microbial plaque
Which of the following defines distinct areas of bacteria attachment?
Which of the following defines distinct areas of bacteria attachment?
- Adhesive, invasive, and stationary
- Biofilm, plaque, and calculus
- Attached, detached, and mobile
- Tooth attached, tissue attached and unattached (correct)
Which bacteria are characterized by having double cell membranes and do not stain purple with crystal violet?
Which bacteria are characterized by having double cell membranes and do not stain purple with crystal violet?
- Gram-positive bacteria
- Gram-negative bacteria (correct)
- Aerobic bacteria
- Anaerobic bacteria
Which method is considered most effective in controlling bacteria in a dental plaque biofilm?
Which method is considered most effective in controlling bacteria in a dental plaque biofilm?
What structure within a biofilm facilitates the movement of nutrients to the bacteria?
What structure within a biofilm facilitates the movement of nutrients to the bacteria?
Flashcards
What is a biofilm?
What is a biofilm?
A well-organized community of bacteria that adheres to surfaces and is embedded in an extracellular slime layer.
What are the distinct areas of bacterial attachment zones?
What are the distinct areas of bacterial attachment zones?
Tooth attached, tissue attached, and unattached.
What are bacteria called that don't stain purple with crystal violet?
What are bacteria called that don't stain purple with crystal violet?
Bacteria that have a double cell membrane and do not stain purple with crystal violet.
Is microbial plaque the primary cause of periodontal disease?
Is microbial plaque the primary cause of periodontal disease?
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Is a biofilm a complex and dynamic microbial community embedded in an extracellular matrix?
Is a biofilm a complex and dynamic microbial community embedded in an extracellular matrix?
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Study Notes
Biofilm Quiz
- A well-organized community of bacteria adhering to surfaces embedded in an extracellular slime layer is called a biofilm.
- Bacterial attachment zones can be categorized as tooth attached, tissue attached, or unattached.
- Bacteria with double cell membranes that do not stain purple with crystal violet are anaerobic.
- Microbial plaque is a primary cause of periodontal disease (True).
- Plaque biofilms are best removed by chemical agents, not just mouthwash (False).
- A biofilm is a complex dynamic microbial community embedded within an extracellular matrix (True).
- A biofilm can also be defined as a simple dynamic microbial community embedded within an extracellular matrix (False).
- Toothbrush and floss are effective in controlling bacteria in dental plaque biofilms.
- Fluid channels in a biofilm facilitate nutrient transport to bacteria.
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