concentrations on the activity of osmosis in plant tissue. Background scientific theory: Plants exchange gases (CO2 and O2) in maintaining vital respiratory processes and in carrying out photosynthesis; they absorb certain minerals and sugars so to use as a source of energy and eradicate wastes in order to maintain specific requirements for survival. Large amounts of water are absorbed by root hairs and are then distributed across the cells of plants by the process of osmosis; water being essential to
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Diffusion‚ Osmosis‚ Active Transport There are two ways in which substances can enter or leave a cell: 1) Passive a) Simple Diffusion b) Facilitated Diffusion c) Osmosis (water only) 2) Active a) Molecules b) Particles Diffusion Diffusion is the net passive movement of particles (atoms‚ ions or molecules) from a region in which they are in higher concentration to regions of lower concentration. It continues until the concentration of substances is uniform throughout. Some major examples of diffusion
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he mass and length of the potato piece must be kept the same in each experiment primarily because they affect the surface area of the piece‚ and varying surface area could have a great effect on the rate of osmosis. This is because in an experiment where the potato chip has a large surface area‚ there is a larger area of partially permeable membrane and therefore more opportunity for water particles to pass through. I will keep the surface area the same by keeping the mass and length
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Osmosis Experiment Subject: Professor Egg-avier Duration: 3 weeks (Oct 2nd – Oct 16th) Week 1 On October 2nd my group was giving a raw egg (weighing 58.8 grams) and placed it into a clear mason jar with 200mL of vinegar. The ph levels of our vinegar equaled a 2 which tells us that vinegar is a fairly acidic liquid. Once submerged in the vinegar‚ little bubbles began to appear around the egg’s shell. We believed this to be carbon dioxide escaping from the shell. We left our egg to sit in the
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Introduction Glucose is very important in our daily lives. It gives us energy to carry out all of our activities. Cells in our bodies need glucose to respire and in the process release the energy we need. Glucose is also a type of carbohydrate. It has a chemical formula of C6H12O6 and is a monosaccharide reducing sugar (Kolej Mara Banting – Students’ Handbook for Biology HL Year 1). It is the simplest form of carbohydrate. In this experiment‚ sulphuric acid‚ H2SO4 and potassium permanganate
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Diffusion and Osmosis Introduction Tonicity refers to the concentration of solutes in a solution (Lab 6-7). There are three stages of tonicity: Isotonic‚ hypertonic and hypotonic. Four unknown solutions were given and labeled as followed: Solution A‚ Solution B‚ Solution C‚ and Solution D. Since potato cells were used for this type of experiment‚ in an Isotonic solution the solute and water concentration are the same as inside the cell in which the isotonic solution contains 0.9% NaCl. In other words
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Question How do digestive enzymes convert sucrose and lactose into glucose? II. Background Research Do you enjoy eating smoothies packed full of berries and other tasty fruits? This paper is going to discuss how digestive enzymes convert sucrose and lactose into glucose. The following terms will discuss; Sucrose‚ Glucose‚ Lactose and Digestive Enzymes. Sugar is any of a class of crystalline carbohydrates such as sucrose‚ glucose‚ or lactose‚ that dissolves in water and have a characteristic sweet
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LABORATORY REPORT Activity: Blood Glucose Regulation Name: Jazmine Ricine Parham Instructor: Professor Deno Date: 12.03.2014 Predictions Plasma glucose levels will be highest immediately after the meal (0 hr) Plasma ketone levels will be highest 1-3 hours after the meal Plasma insulin levels will be highest immediately after the meal (0 hr) Plasma glucagon levels will be highest before the meal (fasting) Materials and Methods Dependent Variable plasma levels of glucose‚ ketones‚ insulin‚ and glucagon
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Question 1: How does Osmosis works It refers to the movement of water molecules from an area of high-level water concentration‚ that is‚ a dilute solution‚ to an area of low-level water concentration‚ that is‚ a strong solution through a semi-permeable membrane. (Passmyexams.co.uk‚ 2015) Actually‚ water moves in a bi-directional manner with the aim of leveling up the concentration. However‚ a high number of water molecules move from the fresh water towards the salty water. The outcome
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changed colour from pink to blue. About five minutes later the second red litmus paper in line had also changed from pink to blue. Two days later the entire tube had changed colour from pink to blue‚ thus proving that diffusion had occurred. 4. Using my knowledge of diffusion I can easily state that the change of colour the red litmus paper had (from pink to blue) occurred through the act of diffusion. This was due to the fact that there was a high concentration of ammonium hydroxide on the cotton
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