CONTENTS Lamm Table of Content now needs to be re-arrange to match labs in body of manual. ORGANISMS IN THE ENVIRONMENT 2 DIFFUSION 3 OSMOSIS 4 PHOTOSYNTHESIS I (STRUCTURE OF THE LEAF) 6 PHOTOSYNTHESIS II (STARCH TEST ON LEAF) 7 PHOTOSYNTHESIS III (IMPORTANCE OF CHLOROPHYLL) 8 NUTRITION I (ENZYME ACTION) 9 NUTRITION II (FOOD TESTS) 11 FOOD TEST INSTRUCTIONS 13 RESPIRATION I (RESPIRATORY SUFACES) 15 RESPIRATION II (STRUCTURE OF A FISH GILL) 16 TRANSPORT IN PLANTS (TRANSPIRATION) 17 RESPONSE I (PUPIL
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Cell Membranes and Transport Hands-On Labs‚ Inc. Version 42-0033-00-01 Exercise 1: Diffusion Observations Data Table 1: Rate of diffusion in different temperatures | | ºC | Minutes | Temperature | InitialTemp. | InitialColor | 5 | 10 | 15 | 20 | 25 | 30 | 60 | Cold | 10°celsius | clear | clear | clear | clear | clear | clear | light purple | light purple | Ambient | 25°celsius
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Factors affecting the movement of water through osmosis Introduction In this I will be investigating what effects the movement of water through osmosis. Osmosis is the diffusion of water. It is the process in which fluids pass through a partially-permeable membrane. It is the movement of water from high water concentration to low water concentration. Plant cells react to osmosis by hypertonic‚ isotonic and hypotonic. Keywords Hypertonic – is when the water outside of the cell is lower than
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Observations: Part I: Reaction between iron and oxygen Appearance of steel wool after 20 minutes From (relatively) shiny metal strips to notsoshiny strips that are stained with dark‚ reddishbrown stuff. Part II: Decomposition of hydrogen peroxide Appearance of potato and hydrogen peroxide combination: Lots of white‚ foamy bubbles around the potato slices. Day 2 Observations: Part III: Reaction between zinc and acetic acid Appearance of penny in vinegar after 30 minutes: Pretty dark coloured
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Experiment 5 Title: Membrane Permeability Objectives: 1. Define solvent‚ solute‚ solution‚ selectively permeable‚ diffusion‚ osmosis‚ concentration gradient‚ equilibrium‚ turgid‚ plasmolyzed‚ plasmolysis‚ turgor pressure‚ tonicity‚ hypertonic‚ isotonic‚ hypotonic; 2. Describe the effects of hypertonic‚ isotonic‚ and hypotonic solutions on Elodea leaf cells and onion scale leafs. Introduction: Membrane permeability is a quality of a cell’s plasma membrane that allows substances to pass in
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CE BIO 1994 1. (a) (i) The formation of red precipitate indicates the presence of reducing sugar (glucose) in the water ------------------------------------------------------------------- 1 This shows that the dialysis tubing is permeable to glucose / permits the diffusion of glucose into the external solution ------------------------------------------ 1 (ii) (1) Increased amount of precipitates in set-up a indicates the presence of more reducing sugar -------------------------------------------------------------
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The purpose of this lab was to determine if hemolysis would occur‚ and how long it would take to occur to red blood cells when blood suspension is introduced to solutions prepared at different temperatures‚ and solutions prepared at different tonicities. In part 1‚ red blood cells were suspended in four different solutions of NaCl (Sodium Chloride) and timed to see if and how long it would take for hemolysis to occur. In Part 4‚ blood suspension containing red blood cells was introduced to three
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3- Explain the medical importance of tonicity. Think about dialysis and IVs. Since tonicity is only influenced by solutes that cannot cross the membrane but it can exert‚ Solutes will be able to freely cross the membrane and do not affect tonicity because they will always be in equal concentrations on both sides of the membrane. Also‚ water will flow from a hypotonic solution to hypertonic. 4- Explain the direction of osmosis and effects of tonicity (hypotonic‚ hypertonic‚ or isotonic) in
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Osmolarity and tonicity are related‚ but different concepts. Thus‚ the terms ending in -osmotic (isosmotic‚ hyperosmotic‚ hyposmotic) are not synonymous with the terms ending in -tonic (isotonic‚ hypertonic‚ hypotonic). The terms are related in that they both compare the solute concentrations of two solutions separated by a membrane. The terms are different because osmolarity takes into account the total concentration of penetrating solutes and non-penetrating solutes‚ whereas tonicity takes into account
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BioLab3 Cell Membranes Lab Report Student Name: I. Diffusion Define the following terms. Solvent Solute Solution. Diffusion Concentration gradient Dynamic equilibrium EXERCISE 1 – Factors influencing rate of diffusion Predict how molecule size and temperature will affect the outcome of this experiment. Record the data from the information in the lab. Potassium Permanganate R.T. Methylene Blue R.T. Time (min) Total Diameter
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