Explain how ventilation and blood flow maintain diffusion gradients at lungs and gills.
Tę umiejętność sprawdzają 3 zadania wzorowane na arkuszach IB z lat 2024–2025.
Biologia IBPaper 1A, specimen 2025wzorowane1 pktzamkniętełatwe (szac.)
Which statements apply to gas exchange in healthy mammalian lungs? I. Gases cross a moist exchange surface. II. Ventilation helps maintain the gradients driving diffusion. III. Breathing can remove water vapour from the body. A. I and II only B. II and III…
Biologia IBPaper 3, maj 2024, TZ2wzorowane2 pktotwarteśrednie (szac.)
Explain why increased exercise changes total ventilation.
Biologia IBPaper 2, maj 2024, TZ1wzorowane16 pktotwarteśrednie (szac.)
(a) Outline how lipids serve as energy reserves in humans. (b) Describe how an oxygen concentration gradient is maintained between alveoli and blood. (c) Explain why sunlight supports the energy supply of a photosynthetic ecosystem.