forms channels for substances to move across a membrane concentration gradient a gradual change in the concentration of solutes in a solution as a function of distance through a solution. crenation A process resulting from osmosis in which red blood cells‚ in a hypertonic solution‚ undergo shrinkage and acquire differentially permeable some substances pass through freely while other do not-small uncharged molecules pass through the cell membrane following their concentration gradient diffusion
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Title: Osmosis and water potential Aim of the experiment: Finding the water potential of potato. Biological principles: Independent variable: concentration of the solution. Dependent variable: percentage changed in weight of the potato strips. Controlled variable: size of the potato strips‚ it can be controlled by cutting the length of the strips. Procedure: Table 1. Concentration of sucrose solution table Concentration/ M | Sucrose Solution/ ml | Distilled
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active and passive transport through the membrane. 2. Explain your observations in detail in terms of concentration gradient‚ diffusion‚ osmosis‚ osmotic pressure‚ passive transport‚ and active transport. Explain what happened to the blood cells at the various levels of concentration. Be sure to refer to the solutions as being hypotonic‚ hypertonic and isotonic. The plasma membranes are made up of proteins that form pores and channels‚ cholesterol to provide membrane stability and carbohydrate
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salt (Na)‚ 0.897% Na‚ 5.0% Na‚ and distilled water with a 0.0% Na solute concentration. My hypothesis is that cellular form and contents will either change or maintain form and consistency when introduced to these various different environments as osmosis occurs until a dynamic equilibrium has been reached between the membrane and its environment. It was found that when RBC’s are introduced to various solute concentrates their form and consistency did changed with highest amount of hemolysis evident
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passive transport mechanisms include diffusion‚ osmosis‚ and facilitated diffusion. Diffusion is the movement of materials from an area of most concentrated to an area of least concentrated‚ which is equal to moving down a concentration gradient. When the molecules have reached equal concentrations in both locations‚ diffusion ends and it has reached equilibrium. Molecules continue to move‚ but move in both directions equally; there is no net change! Osmosis is the movement of water. It moves water
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Labset Three Worksheet 1. What is a carbohydrate profile? Why are they used as a diagnostic or identifying tool? (2) Carbohydrate profiles are specific information on the type and amount of carbohydrate that a product contains. It is used to identify and differentiate two closely related species. 2. What are the carbohydrate profiles of the organisms you tested? (2) The yeast carbohydrate profile came out with glucose and fructose positive and Mannitol negative. The staph epidermidis
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Biology 200A-section 002 Abstract: My group and I conducted the experiment that estimates osmolarity by change in weight of potato tubers‚ this was conducted in order to explore the process of diffusion and osmosis and more importantly to investigate the question of “Does different concentrations of sucrose solutions have an effect on the final weight for the potato tubers?” In this experiment we estimated the osmolarity of potato tuber cores by submersing different
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the sugar molecules. Indicate which side is initially hypertonic and which is hypotonic. Show‚ using an arrow‚ the direction of osmosis. 4. Red blood cells are placed in three beakers containing the following solutions: Beaker distilled water‚ Beaker B – isotonic solution‚ Beaker C – 5% salt solution. Describe the
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Material and Methods * Osmosis : -thistle funnel tube -dialysis tubing sack -saturated NaCl w/food coloring -beaker with distilled H2O The experiments begins with the construction of a simple osmometer by obtaining pre-soaked length of tubing ‚opened and tied at the end. The tube is filled with saturated NaCl solution (with added food coloring) and the thistle is inserted in the dialysis tubing. The dialysis tubing is sealed to the thistle funnel with dental floss and placed in a beaker
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Nucleus- The nucleus is the control center of the cell. This is where DNA is contained. This is like the town hall or the mayor’s office because it is the control center of a town. The nucleus uses DNA like a city uses blueprints to direct the production of protein. Nucleolus- The nucleolus is where ribosome is made and is rich in RNA content. It is located inside the nucleus. A mayor is like this because the mayor makes everything in the town happen. He also works from the town hall‚ or works
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