Introduction The purpose of this lab is to find out which osmotic environment the eggs are in while sitting in different liquids. There are three different types of environments: hypotonic‚ isotonic‚ and hypertonic. Hypotonic solution causes the cell to swell until it bursts. Hypertonic solution causes the cell to shrink or to lose weight. Isotonic solution doesn’t cause the egg to shrink or swell‚ it keeps the cell the same it’s just in a different environment. The hypothesis for the egg in
Premium Chemistry Osmosis
down sucrose is too large of a molecule to diffuse through semi permeable membrane and wouldn’t be able move in and out of cells affectively. Because potatoes have sucrose inside them a concentration gradient is present and if placed in any solution osmosis movement of water through semi permeable membranes would naturally occur. If the concentration of sucrose in the solutions is less than the concentration in the potato then the potato will gain mass and vice versa. In conducting this experiment sucrose
Premium Glucose Solution Concentration
Education 28: 83 – 85. Bland‚ W. and C. B. Tanner (1985) Measurement of the water potential of stored potato tubers. Plant Physiology 79: 891-895. Boyer‚ JS (1969) Measurement of the water status of plants. ARPP 20:351-364. Koning‚ R (1999) Web Site: Osmosis Lab. Kramer‚ P (1983) Water Relations of Plants. Academic Press‚ NY. Meidner‚ H (1984) Class Experiments in Plant Physiology. George Albert Unwin‚ Boston. Reiss‚ Carol (1994) Experiments in Plant Physiology. Prentice-Hall‚ Englewood Cliffs‚ NJ. Ross
Premium Cell wall Tuber Osmosis
Introduction In this Lab the students dealt with Osmosis‚ movement of water molecule or solvent from a high concentration to a low concentration‚ through selective permeability‚ a protective barrier that provide some particle the ’direct ’ passage in and out of the plasma membrane ( Lacerda L.2011) Allowing some molecules enter and exit the cell membrane‚ to create a balance in concentration inside and outside of the cell‚ by doing so the cell often become hypotonic‚ where the concentration
Premium Cell membrane Diffusion Molecular diffusion
2007) was utilised to measure the photosynthetic activity in silver beet chloroplasts. The rate of DCPIP reduction was measured at varying distances from the light source. Assays with a spectrophotometer were performed to find and compare the absorbance‚ and hence quantitative effects of light intensity on the chloroplasts. The aim was to determine how the quantity of light affects the rate of photosynthetic activity in silver beet (beta vulgaris) chloroplasts. The greatest rate of photosynthetic
Premium Photosynthesis Light Oxygen
perhaps the single most important molecule in any living system (Hayden and McNeil 2012). Since water molecules are so small‚ they are constantly going into and out of the cell. Osmosis is a situation where more water molecules are moving across the membrane in one direction than the other (Hayden and McNeil 2012). During osmosis the net movement of water molecules will be from a solution that has a lower osmotic concentration to a solution that has a higher osmotic concentration. When a solution has
Premium Concentration Osmosis Chemistry
PLASMA MEMBRANE SELECTIVE PERMEABILITY= allowing some substance to cross it more easily than others composed of: Phospholipids Proteins Carbohydrates Cholesterol FLUID MOSAIC MODEL Phospholipids are primary lipids(constantly moving‚ fluidly) AMPHIPATHIC-containing hydrophobic and hydrophilic regions Mosaic part=not made of one thing Freeze-fracture studies:way to view what’s inside FLUIDITY OF MEMBRANE Move within bilayer Most of lipids and some proteins‚ drift laterally
Premium Membrane biology Cell membrane Lipid bilayer
passed with succulent stalks” expresses the happiness felt when seeing the cane stalks. That feeling is quickly lost by the next two lines as the poet describes the first instance of change‚ the change from soft sweet sugar cane to its hybrid form of beet sugar which broke teeth and the sorrow they felt when they were no longer able to eat and take from the passing carts. The next stanza describes the uses of the cane stalks to the slaves and how they were able to make pillows for them to rest at the
Premium Sugar Sucrose Plantation
Diffusion is one of several transport phenomena that occur in nature. A distinguishing feature of diffusion is that it results in mixing or mass transport without requiring bulk motion. Thus‚ diffusion should not be confused with convection or advection‚ which are other transport mechanisms that use bulk motion to move particles from one place to another. In Latin‚ "diffundere" means "to spread out". There are two ways to introduce the notion of diffusion: either a phenomenological approach starting
Premium Diffusion
DIFFUSION= The movement of atoms or molecules from an area of higher concentration to an area of lower concentration. Atoms and small molecules can move across a cell membrane by diffusion. OSMOSIS= Diffusion of fluid through a semipermeable membrane from a solution with a low solute concentration to a solution with a higher solute concentration until there is an equal concentration of fluid on both sides of the membrane. SELECTIVE PERMEABLE MEMBRANE=a membrane (as a cell membrane) that allows
Premium Cell Osmosis Chromosome