Diffusion 0.0 / 5 ? BiologyCellular processesASAQA Created by: Eema003Created on: 31-01-16 14:07 Simple Diffusion Passive transport Energy comes from the nautural inbuilt motion of particles. All particles are constanlty in motion Particles are constantly bouncing off each other as well as objects such as organelles. 1 of 3 Diffusion The net movement of molecules or ions froma high concentration to a region of lower concentration until equillibrium is reached. 2 of 3 Facilitated diffusion The plasma membrane is not readily permeable. Only small, non-polar molecules like oxygen can diffuse easily. The movememnt of this is made easier (facilitated) by the transmembrane channels and carriers that span across the membrane. Passive process Down a concentrated gradient. 3 of 3
WHY MULTICELLULAR ORGANISMS NEED SPECIALISED EXCHANGE SURFACES AND SINGLE CELLED ORGANISMS DO NOT 4.5 / 5 based on 3 ratings
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