Biology 9700 · AS & A Level · Respiration

Respiration — practice question

A respirometer may be used to find out how temperature changes the rate of respiration in woodlice. Woodlice are tiny invertebrate animals. Fig. 2.1 shows one woodlouse. Fig. 2.2 shows a basic respirometer.
(a)[4]

Explain how the experimental arrangement shown in Fig. 2.2 makes it possible to determine the respiration rate of woodlice.

(b)[1]

A student measured the rate of respiration of woodlice at $5\,^{\circ}\text{C}$ and at $20\,^{\circ}\text{C}$. Predict and explain how the respiration rate of woodlice at $5\,^{\circ}\text{C}$ compares with that at $20\,\circ\text{C}$.

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