I am running a webinar on the kidney or the 1st of May 2019 - details here.
Going through past papers by topic often gives a useful insight into the thoughts of the examiners and how they see a topic and the emphasis they put on different parts of a specification. I have included all the markschemes and comments from the examiners reports. PDF below.
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Here are lots of good questions on the kidney. I expect the kidney to appear frequently in the new style papers as they are very synoptic, give opportunities to require calculation and get students to analyse and explain data. If you use this then please like and share