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SANutritionQuick questions
Topic 1: Principles of Human Nutrition
Quick questions on The gut microbiome and health (SACE Stage 2 Nutrition)
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is fermentation and energy?Show answer
When bacteria ferment fibre they produce short-chain fatty acids such as butyrate. These nourish the cells lining the colon, help maintain the gut barrier and provide a small amount of energy.
What is vitamin production?Show answer
Some gut bacteria synthesise vitamins, including vitamin K and several B vitamins, adding to the supply from food.
What is immunity?Show answer
A large part of the immune system sits in the gut wall. A healthy microbiome helps train the immune system and crowds out harmful microbes by competing for space and nutrients, a protective effect sometimes called colonisation resistance.
What are wider health links?Show answer
Research links the microbiome to digestion, weight regulation, blood glucose control, inflammation and even mood through the gut to brain connection. Many of these links are still being investigated, which makes the microbiome a good example of how nutrition science evolves.
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