Contrasts:
Firstly, the movement of Particles, where Active Transport moves against its concentration gradient, where it can move from a low concentration to a high concentration, such as the transport of Ions and Glucose, whereas Passive Transport moves with its concentration gradient, from a high concentration, to a low concentration to level the concentration, such as the movement of water in Osmosis and the movement of Particles in Diffusion. Secondly, the mechanisms involved in Active Transport and Passive Transport, as pumps and channels are needed to move specific particles or proteins against the concentration gradient, whereas Passive Transport involves lower mechanisms to move particles across the membrane, as small particles move across the Phospholipids. Finally, the last contrast is the involvement of ATP in Active Transport, but not in Passive Transport. ATP is a class of Energy and energy is needed more in Active Transport than Passive Transport as particles need to be forced against the concentration gradient. Also the particles will be large and need a "helping hand" during the process of them moving against its concentration gradient.
Comparisons:
Firstly, Active Transport and Passive Transport are both involved within the Phospholipid Bilayer naturally. This is because Active Transport mechanisms, such as protein channels, are embedded with or lie on the Phospholipid Bilayer. Also in Passive Transport, molecules slip within the Phospholipids and out on the other side. Finally, Active Transport and Passive Transport naturally transport Partilcles across the Phospholipid Bilayer, to supply the cell with its requirements. Active Transport does this by Protein Channels and Vesicles, whereas Passive Transport use methods like Diffusion and Osmosis
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