Discuss the movement (of substances) inside cells Substances can travel from inside the cell out and from outside of the cell inwards across a membrane. Movement of substances also occurs inside the cell and is part of many of the processes that occur inside cells in both eukaryotic and prokaryotic cells as well as animal and plant cells. The movement of substances may occur across a semi-permeable membrane such as the phospholipid bilayer membrane on the outside of a cell in the digestive
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only thing keeping the liquid goo inside is the thin‚ flexible membrane. Naked eggs are eggs with their shell removed after a vinegar soak revealing the membrane without cracking the egg. The membrane keeps the soft‚ gooey insides‚ inside the egg. Osmosis is when there is an imbalance between two solutes and the liquid will move to balance the solutes making them the same. The more concentrated solute is going to pull to the side that has less concentration and will become the same concentration. In
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Big Idea 2 Biological systems utilize free energy and molecular building blocks to grow‚ to reproduce and to maintain dynamic homeostasis. Living systems require both free energy and matter to maintain order‚ grow and reproduce. Organisms employ various strategies to capture‚ use and store free energy and other vital resources. Energy deficiencies are not only detrimental to individual organisms; they also can cause disruptions at the population and ecosystem levels. Biological systems must both
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AP BIOLOGY CELL UNIT ACTIVITY #5 NAME_____________________ DATE___________HOUR_____ CELL TRANSPORT MEMBRANE PROPERTIES PASSIVE TRANSPORT CHARACTERISTICS: DIFFUSION: Cell Unit Activity #5 page 1 OSMOSIS : ISOTONIC ANIMAL CELLS Cell Unit Activity #5 page 2 HYPOTONIC HYPERTONIC PLANT CELLS OSMOREGULATION – ADAPTATIONS Paramecium Fresh Water Bony Fish FACILITATED D IFFUSION: Cell Unit Activity #5 page 3 Marine Bony Fish ACTIVE TRANSPORT CHARACTERISTICS:
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Throughout this lab‚ diffusion and osmosis has been seen and tested through experiment. In part A of the lab‚ diffusion was demonstrated with two solids and an agar gel petri dish. One crystal of potassium permanganate and one crystal of methylene blue were placed on either side of an agar gel petri dish. The purpose of this experiment was to determine which of the crystals would diffuse across the gel more. So the question is‚ which solid would have a higher rate of diffusion through the agar‚ methylene
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Potato Osmosis Biology SL - ATh INVESTIGATION “Potato Osmosis” INTRODUCTION Osmosis is a process that occurs at a cellular level that entails the spontaneous net movement of water through a semi-permeable membrane from a region of low solute concentration to an area of high solute concentration in order to equalize the level of water in each region. Involved in this process are hypotonic‚ hypertonic and isotonic solutions. A hypotonic solution is one with a lower osmotic pressure‚ indicating
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Diffusion and Osmosis Diffusion The exchange of substances between cells and the environment occur in ways that require metabolic energy (active transport) and in ways that do not (passive transport-Energy from natural‚ inbuilt motion of particles). Diffusion is an example of passive transport. Diffusion is the net movement of molecules or ions from a region where they are more highly concentrated to one where their concentration is lower. Figure 1 Figure 2 Diffusion is only
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Problem question: When a Shell - less egg is placed into a beaker of corn syrup‚ will there be any water going into or out of the egg and if the shell - less egg is placed in a beaker of distilled water will be any net flow of water going into or out of the egg. Hypothesis: If a shell - less egg is placed into a beaker of corn syrup solution‚ then there will be a net flow of water going into the egg because the water molecules will be small enough to pass through the membrane of the egg. If
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you be able to observe any diffusion?NO there is no diffusion taking place. 12. Does being unable to observe diffusion necessarily mean that diffusion is not taking place? yes you should be able to tell when equilibrium is reached Osmosis Activity 4: Osmosis 13. Did you observe any pressure changes during the experiment? If so‚ in which beaker(s)‚ and with which membranes? Yes in the left beaker at the membrane 20. 14. Why? 15. Did the Na+/Cl- diffuse from the left beaker to the right
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Osmosis is similar to simple diffusion in that both processes are passive‚ allowing molecules to diffuse through a membrane from an area of high concentration to an area of low concentration without the input of energy; however it differs from simple diffusion in that during osmosis‚ water is the molecule being diffused‚ and is typically the solvent while in simple diffusion solute molecules
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