Gas exchange What is involved in gas exchange. 3.0 / 5 based on 2 ratings ? BiologyBiological molecules, organic chemistry and biochemistryASAQA Created by: Anya MarleyCreated on: 03-01-13 17:07 What do the alveoli create? Large surface area 1 of 9 What property does the alveoli have to create a thin diffusion pathway? One cell thick 2 of 9 What three things do you need for efficient gas exchange in the lungs? Short diffusion pathway, large surface area, high concentration gradient. 3 of 9 What maintains the concentration gradient in the alveoli? Blood flow, air flow. 4 of 9 Does oxygen diffuse into the blood or out of the blood during gas exchange in the lungs? In to the blood down a concentration gradient. 5 of 9 What is it called when blood and air flow maintain a concentration gradient in the lungs? Ventilation 6 of 9 What happens to the diaphragm during inspiration? Contracts and moves downwards 7 of 9 What happens after the diaphragm has contracted during inspiration? Intercostal muscles contract and move upwards and outward. 8 of 9 In biological terms what is breathing out called? Expiration. 9 of 9
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