Bacteria in the Digestive System › Revision notes
Bacteria in the Digestive System — Revision notes
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Quick recap
5 clipsShort clips from the lesson video. Watch a couple to jog your memory, then try the Brain dump below.
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Brain dump
Before you look at anything else, write down everything you can remember about this lesson: key words, facts, examples. Spelling doesn't matter. Then see which of the 15 key terms you remembered.
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Ones you missed. Read these, then try again tomorrow:
Key terms
- Living Organisms
- Bacteria are alive, just like you and me
- Microorganism
- A very small organism that can only be seen with a microscope
- Unicellular
- Made of one single cell
- Cell Wall
- The outer structure that gives bacteria their shape and protects them
- Cytoplasm
- The fluid-filled interior of the cell
- DNA
- Genetic material that floats freely in the cytoplasm (bacteria have no nucleus)
- Pathogen
- A microorganism that causes disease
- E. coli
- A bacterium that lives in the gut; most types are harmless but some cause food poisoning
- C. difficile
- A bacterium that can infect the gut, often after antibiotics, causing severe diarrhoea
- Streptococcus pneumoniae
- A bacterium that causes pneumonia
- Gut Flora
- Bacteria living in your digestive system
- Digestion
- Breaking large food molecules down into small ones
- Enzyme
- A biological catalyst that speeds up digestion
- Vitamin K
- A vitamin produced by gut bacteria that your body needs but cannot make
- Competition
- When organisms compete for food and space to live
TERM — tap to reveal
What this lesson covers
How well do you know each one? Be honest: red means go back over it.
- Describe the structure of a bacterial cell and explain what a microorganism is
- Explain the difference between pathogenic bacteria and helpful bacteria
- Describe the three main jobs gut bacteria do
- Explain how gut bacteria produce enzymes that help digest food
- Explain how helpful bacteria crowd out pathogens
- Describe how antibiotics affect gut bacteria and how the gut recovers
Test yourself
Cover the answer, say it out loud, then check the full quiz on the lesson page.
- Which of the following best describes bacteria?
- What is the role of enzymes produced by gut bacteria?
- Which of the following can damage your gut flora?
Topic quiz
13 questions on this topic only — not mixed with anything else, one at a time.
Question 1 of 13
Score: 0 out of 13
Spelling challenge
Read the definition, then type the correct spelling of the term. Uses the same terms as above.
Score: 0/0