Part A: Title: Diffusion Diffusion is the spontaneous movement of particles from where they are more concentrated to where they are less concentrated. For this experiment‚ a 14 cm glass was filled with cold tap water. A drop of red food coloring was dropped in the cup. A stopwatch was used to measure the time it took for the food coloring to get to the bottom of the cup. The average diffusion rate was .78 cm a second. If a different color was used‚ I do not think it would have made a difference
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effects of solutions containing varying levels of tonicity to red blood cells. Tonicity describes what happens to a cell when it is placed in a certain solution. Hypertonic solutions contain a lower solute concentration than the cell cytoplasm‚ hypotonic solutions contain a higher solute concentration than the cell’s cytoplasm‚ and isotonic solutions contain relatively the same
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called a ________. A) weak electrolyte B) semiconductor C) strong electrolyte D) nonelectrolyte E) nonconductor 2) A solution with the same osmotic pressure as the blood is ________. A) isotonic to the blood B) molar to the blood C) hypotonic to the blood D) nontonic to the blood E) hypertonic to the blood 3) Water is a polar solvent and hexane (C6H14) is a nonpolar solvent. Which of the following correctly describes the solubility of the solute in the given solvent? A) CaCl2‚ soluble
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concentration to a solution that has a higher osmotic concentration. When a solution has a higher concentration of solute within the cell than out‚ it is called hypertonic. When a solution has a lower concentration of solute within the cell than out‚ it is called hypotonic. And when there are equal concentrations inside and out of the cell‚ it is called isotonic. The relative osmotic concentration can be determined by a change in mass of the tissue. The purpose of this experiment is to calculate the mass/change
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AP Reading Guide Fred and Theresa Holtzclaw Chapter 7: Membrane Structure and Function Name_______________________Period___________ Chapter 7: Membrane Structure and Function Concept 7.1 Cellular membranes are fluid mosaics of lipids and proteins 1. The large molecules of all living things fall into just four main classes. Name them. 2. Explain what is meant when we say a molecule is amphipathic. 3. In the 1960s‚ the Davson-Danielli model of membrane structure was widely
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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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at the effects of osmosis in this lab through the examination of red blood cells (sheep)‚ plant cells (elodea)‚ and active transport in yeast. Under the microscope‚ we can determine the effects on plant and animal cells exposed to hypotonic‚ hypertonic‚ and isotonic sodium chloride solutions. Plant cells have a cell wall; however‚ animal cells do not. This is examined as a major difference between the two; therefore‚ under the microscope both cells appear much unique from one another. The animal
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to observe the response of animal and plant cells into these conditions‚ red blood cells (RBCs) and Hydrilla leaf were used and were exposed into different concentrations. Both cells exhibited hypertonic and hypotonic solutions when exposed to high and low concentrations respectively‚ while exhibiting isotonic when concentrations are equal. Three experiments using dialyzing bags were conducted. The first experiments used three set-ups. The first set-up was a dialyzing bag filled with saturated NaCl
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6M‚ and weighing the potato. We concluded that the osmolarity of the potato was about 0.4M since the weight of the potato did not change after it was incubated in the solution with 0.4M. We also found that the potato was hypertonic to sucrose solutions of 0.0-0.3M and hypotonic to 0.5-0.6M. C. Dialysis Tubing Experiment We tested the permeability of the dialysis tubing to glucose‚ starch‚ and iodine. Initially‚ glucose and starch were placed into the bag‚ and iodine outside of the bag in
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properties of diffusion and osmosis to see the effects of either corn syrup or water on a shell-less raw egg over a three day period. While looking to see the effects of these liquids on the raw egg‚ one can also apply the properties of hypotonic‚ hypertonic‚ and isotonic solutions. Introduction Cells have an outer covering called the cell membrane. The membrane is selectively permeable meaning that it has tiny pores or holes that allow objects to move across it. The cell membrane controls what moves
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