experiment was to estimate the osmolarity of potato tuber and celery cells by change of weight.Pieces of potato tuber and celery would be incubated in different sucrose solutions to find out the molarity at which weight of potato and celery tissues do not change. My hypothesis was that the Table 1: Group Data for Experiment:Estimating Osmolarity by Change in Weight Table 2 : Class Data(Using Averges from Table 1): Estimating Osmolarity by Celery Sucrose
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information below to complete the Osmosis Experiment. Materials 1 fresh baking potato Water Salt Four small containers (i.e.‚ drinking cups or clear glasses) A metric ruler Methods and Procedure 1) Place 1 cup (236 ml) of water in each of the 4 containers. In 2 of the containers‚ add 1 tablespoon (14.8 ml) of table salt and mix well until dissolved. Label which containers have salt. Cut a fresh baking potato into 5 mm slices. Cut four rectangles 2.5 cm x 1 cm from the slices as close
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weight change in potato cubes 2) To determine the isotonic solution concentration for the potato Hypothesis: 1) If the concentration of the salt solution is higher than the concentration in the potato cubes‚ the percentage of weight change in potato cubes will be higher (positive). If the concentration of the salt solution is the same as the concentration in the cell‚ there will be no net movement of water through osmosis therefore there will be no percentage of weight change in potato cubes 2) The
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many factors that influence the rates of diffusion. In experiment 5.2 we investigate both animal and plant cells in different molar solutions and the different osmotic behaviors within the cells. In experiment 5.3 we test the osmolarity of plant cells through the usage of potato tuber cells. In experiment 5.1 in order to observe diffusion we examine the Brownian movement by observing carmine on a wet mount slide‚ and by using dialysis tubing‚ we investigate the selective permeability to reducing sugar
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Christine Otieno Estimating Osmolarity of plant Cells(potato and celery)by percentage change in weight Using different sucrose concentrations Introduction The purpose of this experiment was to estimate Osmolality of plants cells i.e. Potato and celery by converting the observed change of weight in different sucrose concentrations. The hypothesis assumes that the solute concentration of the plant samples would be indirectly proportional to the weight; there would be decrease
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Potatoes The initial weights of the potato cubes ranged from 0.93-1.04 grams from the solutions containing AgNO3 (Table 1). Graph one depicts the correlation of percent change in weight for each sucrose concentration with AgNO3 added. The initial length of the potato cylinders were 2cm as depicted in table two. Graph two depicts the correlation of percent change in length in different sucrose concentrations. The initial weights for the solutions lacking AgNO3 ranged from 1.0-1.7grams (Table 3)
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Experiment 2 : Transport Across Membrane Name : Matrix No : Group : B Semester : 1 Date of Experiment : 05.09.2013 Lecturer’s Name : Miss OBJECTIVE To study the effects of hypotonic‚ hypertonic and isotonic solutions on plant and animal cells. INTRODUCTION In cellular biology the term membrane transport refers to the collection of mechanisms that regulate the passage of solutes such as ions and small molecules through biological membranes‚ which are lipid bilayers
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Animations Title: Water Homeostasis Introduction 1. a. Water homeostasis is crucial to life. Define blood osmolarity. The osmotic pressure of blood/Measurement of the amount of solute concentrate. b. What is the nephron’s role regarding osmolarity? Filtration‚ reabsorption & secretions c. What two factors regulate body fluid osmolarity? - Formation of a medullary osmotic gradient - The amount of ADH (antidiuretic hormone) present at the
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hypertonic‚ and isotonic in terms of relative concentrations of osmotically active substances. 6. Discuss the influence of the cell wall on osmotic behavior in cells. 7. Explain how incubation plant tissues in a series of dilutions of sucrose can give an approximate measurement of osmolarity of tissue cells. 8. Explain why osmosis is important to cells. Introduction Maintaining the steady state of a cell is achieved only through regulated movement of materials through cytoplasm‚ across organelle
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balanced internal environment. • In achieving homeostasis‚ animal maintain a relatively constant internal environment even when the external environment changes significantly. • In multicellular organisms‚ the internal environment refers to the tissue fluid that baths the cells. Homeostasis • Homeostatic mechanisms maintains optimal physical & chemical conditions in the body to allow normal enzymatic & other cellular activities to be carried out. • This enable the organisms to live in different
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