What muscle activity requires energy released by respiration?
Muscle contraction.
Cambridge IGCSE (9–1) Biology 0970 (Extended) (2026–2028) · 12.1
Revise Cambridge IGCSE (9–1) Biology 0970 (Extended) (2026–2028) specification point 12.1, Respiration, with free active-recall flashcards. Flip through the set or review every question and answer below.
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What muscle activity requires energy released by respiration?
Muscle contraction.
What supplies the energy needed for protein synthesis?
Respiration releases the energy needed.
What supplies the energy needed for cell division?
Respiration releases the energy needed.
Which transport process requires energy released by respiration?
Active transport.
How does respiration support growth?
It releases the energy needed for growth.
What activity in the nervous system requires energy released by respiration?
The passage of nerve impulses.
How does respiration help animals maintain a constant body temperature?
Energy released as heat replaces heat lost to the surroundings.
How can the effect of temperature on respiration rate in yeast be investigated?
Keep yeast with sugar at different temperatures under otherwise comparable conditions. Measure the carbon dioxide produced in a fixed time as an indication of respiration rate.
Which three conditions should be kept the same when comparing yeast respiration rates at different temperatures?
Why is respiration in yeast slower at low temperatures?
The enzyme-controlled reactions proceed more slowly.
How does increasing temperature affect yeast respiration rate before temperatures become high enough to disrupt enzymes?
The respiration rate increases.
Why does yeast respiration rate fall at high temperatures?
High temperatures disrupt the enzymes involved in respiration.