Cell Size: Is Bigger Better? Problem: Why are cells small? Objective: To see the relationship between cell size and diffusion of materials. Hypothesis: If we cut three different sizes of cells‚ then the smallest one will survive the longest due to its sufficient permeable membrane. Cube | Total Volume (cm^3) | Surface Area (cm^2) | Index SA/VOL | 3 | 27 | 54 | .5 | 2 | 8 | 24 | .33 | 1 | 1 | 6 | .16 | Index of Cubes Cube Index SA/VOL Surface Area to Volume Cube | Total
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using protein carriers. Examples of active transport are endocytosis‚ exocytosis‚ and phagocytosis. Passive transport does not require energy it is powered by the concentration gradient of the molecule. Examples of passive transport are diffusion‚ facilitated diffusion‚ filtration‚ and osmosis. In our Osmosis Lab I used a Grade a large egg from the grocery store. Its circumference is 5 ½ inches it is smooth with no cracks. I carefully place the egg in a clear plastic cup and fill the cup with vinegar
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Martha E Rogers was born a hundred years ago on March 3rd 1914 in Texas. She died March 13th 1994 in Phoenix‚ Arizona1. A casual occurrence‚ she shared her birthday with Florence Nightingale born 94 years before and had passed away four years before2. They will share more than a birthdate as we will see later namely the role of the nursing as distinct from medicine. One is helping nature while nursing puts the patient in the best environment for nature to act 3 Martha was born in a family which
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Lab Report Diffusion is - One of two kinds of passive transport‚ - Diffusion can transport ions from higher concentration to lower concentration region without any other forces. - A net movement of molecules in and out of cell membrane - Diffusion can be affected by the steepness of the concentration gradient. Lab question: Is the rate of diffusion influenced by the presence of second molecule? Prediction: the rate of diffusion is influenced by the presence of second molecule
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Throughout time‚ foreign affairs throughout the world have been the stage for many great conflicts. Most recently‚ in the twentieth and twenty-first centuries‚ we have seen a great shift of power. Politically‚ economically‚ and religiously these shifts have created great conflicts. From both World Wars‚ to the Cold War‚ to now the wars in Afghanistan and Iraq‚ the world has undergone changes and these conflicts have adjusted more than just borders‚ rather than our outlook on our world in which
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FIN503 International Business and Finance Case 5 Dr. J. Foo Group #: __________ Group Names:______________________‚ ____________________‚_____________________ ________________________‚ ______________________‚ ________________________ In answering the case questions for each case‚ you should: 1. Show how the materials and chapter topics being covered in class relate to the case. 2. Bring in relevant current events and issues from other sources related to the case or topic
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02.10.2012 Target Marketing Process (STP) Identify markets with unfulfilled needs Segmentation‚ Targeting and Positioning Albert CARUANA Ph.D. Determining market segmentation Selecting market to target Positioning through marketing strategies Customer-Oriented Marketing Strategy • Segment market: – Divide larger market into groups of people with similar demands and responses. Market • Generic definition: A market is a group of people with purchasing power who are willing
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PhysioEx™ Lab: Cell Transport Mechanisms and Permeability Activity 1: Simple Diffusion Chart 1 Dialysis Results (Average Diffusion rate in mM/min) Solute Membrane (MWCO) 20 50 100 200 NaCl (—) 0.0150 0.0150 0.0150 Urea (—) (—) 0.0094 0.0094 Albumin (—) (—) (—) (—) Glucose (—) (—) (—) 0.0040 1) Which solute(s) were able to diffuse into the right beaker from the left? NaCl‚ Urea‚ Glucose 2) Which solute(s) did not diffuse? Albumin 3) If the solution in the left beaker
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in the artificial cells to the diffusion rate using the phenolphthalein-NaOH agar and the HCl solution. Lab #2 was a model of diffusion and osmosis‚ in which we filled the model cells with different solutions and determined the rate of diffusion. In lab #3‚ the results demonstrated the interactions between selectively permeable membranes‚ water‚ and solutes and how they are important in cellular and organismal functions. In lab #1‚ the results showed the diffusion rate between the certain time period
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Examining Diffusion and Osmosis Introduction: Purpose: 1. To simulate and observe the diffusion of solutes and the osmosis of water through a semipermeable membrane through color change and sugar tests. 2. To speculate osmosis occurring in dialysis bags and potato cores by comparing percentage change in masses. Background information: Molecules are always in random‚ constant movement due to their kinetic energy. This causes the molecules of a cell to move around and bump into each other
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