Whats the difference between cellular transport and active transport.?
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active transport is usually classified as endocytosis, exocytosis (pinocytosis or phagocytosis) processes that require cell use of ATP energy from cell respiration to allow molecules to move from LOW concentration to HIGH concentration. It often involves the use of membrane proteins and cell pumps of various kinds to allow substanaces to pass either into or out of the cell.\n\nCellular transport is often described as the movement of substances just within the cytosol or the cytoplasm, not across the cell membrane. ie as substances move from the Golgi to the edge of the cell mbn.
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That is xylem.\nPhloem transports manufactured materials, e.g. sugars.\nLook here:
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Difusion is the movement of particles from an area of high concentration to an area of low concentration, until they are apread out evenly.\n\nExamples for diffusion: \nThe alveoli are well adapted for diffusion of gases, \nthey have a large surface area\nthey are moist, so gases can dissolve\nthey have thin walls\nand a good blood supply.\n\nThe small intestine is specialised for absorption. \nIt has: \nA thin lining\na good blood supply\na very large surface area.\n\nOsmosis is the diffusion of water molecules from a dilute solution to a more concentrated solution through a partially permeable membrane.\n\nA partially permeable membrane allows water molecules to pass through, but not solute molecules.\n\nWhen a plant cells are full of water they are turgid.\nThis rigidity or turgour gives the plant support\nCells are able to absorb some substances against a concentration gradient.\n\nActive transport needs energy from respiration. \n\nActive transport....\nNot all sustances pass into cells by diffusion or osmosis. Some substances are absorbed against a concentration gradient. But to do this energy is needed and it comes from respiration. This process is called ACTIVE TRANSPORT.\nExample of active transport are:\nThe uptake of ions by root hair cells from the soil, where they are in very dilute solution;\nthe uptake of sugar molecules into the small intestine;\nthe re-absorbtion of useful ions in the nephrons of the kidneys.
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Membrane proteins.\n\nSome membrane proteins act as channel proteins that allow for passive diffusion of solutes across the membrane.\n\nOthers are transport proteins that take part actively (require energy) in transport across the membrane. Some transport proteins may be gated.
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Osmosis and diffusion are both passive (do not require energy). They both involove the random movement of molecules from a region of high concentration to a region of low. \nWhen someone sprays perfume into the air, the perfume molecules diffuse around their enviroment, thats why you smell it at the other side of the room after a few seconds.\n\nThe differences are that osmosis is the movement of Water molecules from a high concentration to a low concentration through a semi permeable membrane.
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Diffusion is when solutes go from a higher concentration to a lower concentration through a membrane. Osmosis, on the other hand, is when water diffuses through a semi-permeable membrane from a higher concentration to a lower concentration.
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Since a cell's volume increases significantly more than its surface area as it enlarges, the membrane cannot supply all the requirements of the cytoplasm past a certain point.  This is why cell size is generally limited.  So the function you are referring to is diffusion, the movement of material into/out of the cytoplasm.
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The binding of insulin to cell surface receptors initiates an increase in Glucose Transporter (GLUT) Proteins.\nGLUT Proteins are transmembrane molecules.\nGlucose moves into the cell - facilitated diffusion.\n\nLook here:
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Ionophores- They havea negatively charged channel that allows the solute to enter\n\nFacilitated diffusion- Essentially they capture a solute and tug it into the cell.\n\nactive transport- i believe they look similarly to proteins that facilitate diffusion
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pumping ions across the cell membrane requires energy which is produced by glycosis, the Krebs cycle, and Phosphorilic oxidization.  This electron transfer process yeilds a lot of ATP which is used as energy.
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You're probably referring to the plasma membrane. The interior is hydrophobic, while the exterior is hydrophillic. The phospholipids can translocate horizontally within the bilayer, but can't cross from one layer to the other. So, the membrane behaves like a fluid.  See MIT's website for more info. the link is below
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Hey! I just finished learning about active transport! The teacher confused me soooo bad! I had to have a friend in my class explain it to me. I would suggest going to google and typing in "active transport" and clicking on the news tab on the top. good luck with your project!
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2. Cell membrane and Plasma membrane.
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Cells have different shape to allow them to work better. For example, the alveoli cells are flat and big in surface, these features helps in gas exchange.
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diffusion takes place in a cell and the air.. caused by kinetic energy.. osmosis is the passage of water through a membrane from a higher concentration to a lesser concentration. takes place in body cells and in the leaves of plants...next time do your own homework...
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The main system of transporting nutrients to the body's cells is through the blood stream. But once a nutrient arrives at a needy cell, it is still inside a blood vessel while the cell lies outside. The lack of nutrients inside the cell, and between the cell and the blood vessel, creates a concentration gradient between the blood vessel and the cell. Due to the lower concentration in the cell, the nutrient diffuses through the blood vessel wall and into the cell.
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It would depend on several factors. Small, uncharged molecules can pass through the cell membrane through diffusion. When it is water, it is called osmosis. Diffusion can only occur into the cell when the concentration of the substance is greater outside the cell than within it, and likewise only out of the cell when the concetration is greater inside the cell than outside. This is called the concentration gradient.\n\nWhen the molecule is charged or is large (such as a chlorine ion or a lactose molecule), it requires active transport by carrier proteins. There are also carrier proteins that help to transport against the concentration gradient.\n\n[Edit] \nAfter thinking for a bit, I believe it would be pertinent to include something about the more complex methods of active transport.\n\nThere are two "directions" of the complex forms of active transport: in (endocytosis) and out (exocytosis).\n\nExocytosis is when a vesicle, after being released from the Golgi complex, fuses to the cell membrane, releasing the contents.\n\nEndocytosis is done by three main means: Phagocytosis, Pinocytosis, and Receptor-Mediated Endocytosis.\n\nPhagocytosis is the process of enveloping a large particle, such as how many unicellular organisms "eat" other organisms. The large particle comes in contact with the cell membrane, stimulating the formation of a vesicle. This vesicle then enters the cell and depending on the contents may fuse with a lysosome to help to digest it.\n\nPinocytosis also forms a vesicle, but differs from phagocytosis because it forms a much smaller vesicle.\n\nReceptor-mediated endocytosis is when particles that cannot normally enter the cell bond to receptor proteins embedded in the cell membrane. These proteins then congregate and form a vesicle. \n\nIn all forms of endocytosis and exocytosis, ATP is required for energy.