Surface Area and Cell SIze - 1504 Words

Lab 1- Surface Area and Cell Size: Introduction Background Information- Iodine is an indicator for starch. When iodine is merged with starch, it turns a dark purple/black color. Cells require nutrients in order to survive. Cells must eliminate waste in order to survive. Description of the Experiment- This experiment was done to provide evidence for why cells are so small. Basically, we pretended that each potato cube used was a single cell and the iodine is the nutrients (food) for the cell. Expectations/Hypothesis of the Experimental Outcome- I think that the smallest potato cube will have the nutrients (iodine) diffuse the farthest. The diffusion of the iodine in the potato will move quicker to the middle of the cell in†¦show more content†¦Lab 3- Observing Osmosis in Living Cells: Introduction Background Information- Living cells may be thought of as microscopically small bags of solutions contained within semipermeable membranes. For the cell to survive, the concentration of solutes within the cell must stay within a safe range. A cell placed in a solution more concentrated than itself (a hypertonic solution) will shrink due to loss of water, and may die of dehydration. A cell placed in a solution more dilute than itself (a hypotonic solution) will expand as water enters it. Under such conditions the cell may burst. A cell placed in a solution that is in equilibrium (an isotonic solution) will remain the same and no water will enter nor leave the cell. Description of the Experiment- This experiment was conducted to observe the effect of a certain amount of sucrose in a solution on white potato cylinders. About five or six pieces of potato went into six different solutions that were in increments of 2 m and were labeled by color. The point of this experiment was to see which solutions were hypertonic, hypotonic, or isotonic to a piece of potato. Expectations/Hypothesis of the Experimental Outcome- I think that the potatoes with no change will be in an isotonic solution, the potatoes in a hypertonic solution will shrink, and theShow MoreRelatedSurface Area Volume Ratio Experiment1104 Words   |  5 PagesSurface area / Volume ratio Experiment Introduction: The surface area to volume ratio in living organisms is very important. Nutrients and oxygen need to diffuse through the cell membrane and into the cells. Most cells are no longer than 1mm in diameter because small cells enable nutrients and oxygen to diffuse into the cell quickly and allow waste to diffuse out of the cell quickly. If the cells were any bigger than this then it would take too long for the nutrients and oxygen to diffuse intoRead MoreSurface Area to Volume Ratio and the Relation to the Rate of Diffusion.1322 Words   |  6 PagesSurface Area to Volume Ratio and the Relation to the Rate of Diffusion Aim and Background This is an experiment to examine how the Surface Area / Volume Ratio affects the rate of diffusion and how this relates to the size and shape of living organisms. The surface area to volume ratio in living organisms is very important. Nutrients and oxygen need to diffuse through the cell membrane and into the cells. Most cells are no longer than 1mm in diameter because small cells enable nutrients and oxygenRead MoreAgar Cube Lab Report969 Words   |  4 PagesInvestigating the Relationship between Cell Size and Rate of Diffusion Ban Madi 11 Dp Biology SL Research Question: How does the size of the cell affect its efficiency in exchanging substances through several ways, like diffusion? Aim: To plan and carry out an investigation to show the relationship between volume/Cm3, surface area, and diffusion using agar cubes measured in time/s; and to demonstrate, using diffusion, why the size of cells is limited, keeping the room temperatureRead MoreThe Size Of An Organism1410 Words   |  6 PagesAC 2.1 1) When the size of an organism increases its surface area also increases. 2) When the size of an organism increases its volume also increases. 3) As the size of an organism increases both its surface area and volume increase however the surface area to volume ratio decreases. This is because the volume increases at a greater rate than the surface area. Organisms with a smaller surface area to volume ratio can exchange substance more easily compared with bigger organisms, which require moreRead MoreThe Causes And Uses Of Antimicrobial Nannomaterials1038 Words   |  5 Pagesresearch on nanomaterials have increased rapidly, due to their potential application in different areas to meet new advantageous technological solutions. In general, when particles are minimized to nanometre scale (1nm-100 nm); because their surface area is significantly large relative to their dimension, they start to present peculiar and interesting properties that can increase their effect as the size reduce, like antimicrobial activity (Beyth, et al., 2015). Antimicrobial nanomaterials can bringRead MoreCorrelation Between Surface Area / Volume With Sensitivity1083 Words   |  5 PagesPurpose The purpose of performing part I of this lab was to study the relationship between surface area/volume with regard to rate of diffusion. We used treated agar blocks to model artificial cells because their surface area and volume could be easily measured, and they visually show the amount of diffusion. By using blocks of different sizes (and with different SA: V ratios, we can compare the rate that diffusion occurred for each block. Background Information All molecules are constantly in motionRead MoreObserving Diffusion And Osmosis On The Rate Of Diffusion Across A Cell Membrane1384 Words   |  6 PagesProcedure 1(Surface Area and Cell Size)- *Purpose-How do surface area and cell size affect the rate of diffusion across a cell membrane? *Hypothesis-The cell with the greatest surface area to volume ratio will have the most affective rate of diffusion. Procedure 2(Modeling Diffusion and Osmosis)- *Purpose-How does the molarity of the solution affect the diffusion and osmosis across a semi-permeable membrane? *Hypothesis-The solution will move from an area of low water potential to an area of high waterRead MoreImportance Of Intracellular Bound Nucleus And Organelles Within Eukaryotes1615 Words   |  7 Pagesannotated diagrams where appropriate, membrane-bound nucleus and organelles within eukaryotes cells; explain evolutionary advantages of intracellular compartmentalization. Living cells are the functional biological building blocks of animals. They come together to form complex organic tissues, organs, and whole bodies, as well as some of these organisms themselves existing in a unicellular form. Cells vary in size and dimension, with Eukaryotes ranging from 1x10-3m to 1x10-4m in length, whilst the smallerRead MoreBiology Higher Level Paper 11101 Words   |  5 Pagesmeasured is continuous III. Sample size must be 30 I only II and III only I and II only I, II and III 2209-6007 – 3 – 3. M09/4/BIOLO/HPM/ENG/TZ1/XX+ How does the surface area to volume ratio change with an increase in cell size? A. Surface area / volume B. Surface area / volume C. Surface area / volume Cell size D. Cell size Surface area / volume Cell size Cell size 4. How do prokaryotic cells divide? A. B. C. D. By mitosisRead MoreEffect of Surface Area to Volume Ratio on Rate of Osmosis1471 Words   |  6 Pages[Type text] [Type text] [Type text] _An experiment on the effect of surface area to volume ratio on the rate of osmosis of Solanum tuberosum L._ BACKGROUND A cell needs to perform diffusion in order to survive. Substances, including water, ions, and molecules that are required for cellular activities, can enter and leave cells by a passive process such as diffusion. Diffusion is random movement of molecules in a net direction from a region of higher concentration to a region of lower concentration