You’ll have seen fuels before, in a variety of places. But these? Biofuels are a part of the final section of the AQA B3 course – based around the effect of humans on the environment. So we’re going to be covering biofuels here – ready? Then let’s get to it…

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Homeo-what now? That’s right, homeostasis – if you don’t know what it is, then this article is for you. If you know what it is, this article is still for you, because it’s going to cover all the stuff you need to know about it for the AQA B3 exam (when accompanied with these two articles on kidneys and the pancreas). Ready? Then let’s see what all this fuss is all about…

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Fermenter

Mycoprotein

Mycoprotein is a protein source suitable for vegetarians (who can lack protein in their bodies, as they eat no meat). It is produced from a fungus known as ‘fusarium’ – often in industrial fermenters. Fusarium is grown aerobically using cheap sugar syrup, which is produced from waste starch.

Industrial Fermenters

Industrial fermenters are large machines that have a supply of air, a stirrer and a water jacket. The air supply provides oxygen for microorganisms to aerobically respire, while the stirrer ensures that the microorganisms are equally distributed, and that temperature remains constant throughout the fermenter. The water jacket cools the fermenter, which produces heat because of the microorganisms respiring inside of it. Industrial fermenters also commonly contain both pH and temperature probes, to maintain the optimum conditions for the microorganisms to respire in.

 

kidney

Another organ, you cry? That’s right, at this rate B3 will be covering every organ in the human body, right down to the appendix (here’s a hint: it doesn’t cover any more organs than this, really). So now we get to look at the function of the kidneys, dialysis (the method of keeping those with kidney failure still alive) and kidney transplants. Ready? Then let’s go for it…

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