Diffusion 0.0 / 5 ? BiologyBiological moleculesASAQA Created by: chickpeatweetCreated on: 19-10-14 10:59 What is diffusion the movement of? molecules and ions 1 of 10 Does diffusion go up or down the concentration gradient? down 2 of 10 The type of transport which needs no metabolic energy passive 3 of 10 What are the three main factors which effect rate of diffusion? Concentration gradient, Surface area of diffusion surface, thickness of diffusion surface 4 of 10 What two types of protein does facilitated diffusion use? Channel protein and carrier protein 5 of 10 What types of molecules do channel proteins allow into the cell? water-soluble 6 of 10 What are the three main factors which affect the rate of diffusion? 1) Concentration gradient 2) Surface area of exchange surface 3) 7 of 10 What are the three main factors which affect the rate of diffusion? 1) Concentration gradient 2) Surface area of exchange surface 3) Thickness of exchange surface 8 of 10 What are the three main factors which affect the rate of diffusion? 1) Concentration gradient 2) Surface area of exchange surface 3) Thickness of exchange surface 9 of 10 What is the term for when the concentration of molecules/ions is equal on each side? In equilibrium 10 of 10
WHY MULTICELLULAR ORGANISMS NEED SPECIALISED EXCHANGE SURFACES AND SINGLE CELLED ORGANISMS DO NOT 4.5 / 5 based on 3 ratings
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