Solutions to all three questions of the mathematical physiology course of the University of Oxford examination held on 31 May 2023. Original paper: public examination PDF, inclusive bundle pages 321–324; paper pages 1–4. All eighteen lettered parts are covered, including the third question even though only the best two answers counted. Question 1(c) contains a printed exponent error; Question 2(f) requires a signed recovery cutoff. Both are explained where they arise.