Cells in a culture function best when their internal pH is 7.2. The pH of the liquid surrounding the cells can change.
Which statement describes homeostasis in this cell culture?
The cells maintain the surrounding liquid at pH 7.2 while their internal pH changes.
The internal pH of the cells changes to match the pH of the surrounding liquid.
The internal pH of the cells returns to 7.2 only when the surrounding liquid returns to pH 7.2.
The cells keep their internal pH close to 7.2 even when the pH of the surrounding liquid changes.
76 exam-style questions on AQA GCSE Biology 5.1 Homeostasis, covering 5.1 Homeostasis. Each one has a worked solution and a mark scheme showing where the marks go.