electrochemical gradient? Against? Which require energy input? Which show saturation kinetics? Competitive inhibition? 4. What can cross the cell membrane by simple diffusion? What cannot? Describe and define diffusion‚ osmosis‚ tonicity (hypertonic‚ hypotonic‚ isotonic—in animals and in plants). What does it cost animal cells not to have a cell wall or water vacuole? Does this demonstrate saturation kinetics? Why or why not? 5. Describe and understand facilitated diffusion in detail. What type
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AP/IB 11 Biology Origins of Life on Earth There are multiple theories as to how life began on earth‚ beginning with the findings of various revolutionary scientists. This paper will discuss various scientists’ theories and experiments as they strove to discover how life began‚ and the processes that might have occurred in order to develop and create the world we are now familiar with today. Recent discovered functions of RNA have suggested that RNA provides a crucial framework in the evolution
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Study Guide for Statewide APHY101 Online Midterm Exam (Study Guide ‚ Ivy Tech Community College‚ East Central Region) NOTE: The midterm exam will pull: 40 questions from Chapters 1‚ 2‚ and 3 combined‚ 16 questions from Ch. 4‚ 19 questions from Ch. 5‚ & 25 questions from Ch. 6. Chapter 1 • Explain the difference between the study of Anatomy and the study of Physiology? • Name and define the levels of organization of life? • Define metabolism. • Define
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NATIONAL CENTER FOR CASE STUDY TEACHING IN SCIENCE Water Can Kill? Exploring Effects of Osmosis by Susan D. Hester Department of Molecular and Cellular Biology University of Arizona‚ Tucson‚ AZ Part I – Three True Stories Case 1: Jennifer Strange 1‚2 Jennifer Strange was a 28-year-old mother of three who entered a radio contest to try to win a Nintendo Wii game system for her children. As part of KDND’s “Hold your wee for a Wii” contest‚ Jennifer drank bottle after bottle of water for hours without
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acidic ph (2) solution and the most concentrated alcohol (50%) solution. This is because the solutions were extremely hypertonic to the beetroot cell. Therefore the solutions rushed in and damaged the cell very badly. By damaging the cell‚ the beetroot pigment leaked into the solution. The other solutions took a longer time to get through the bi-layer because they were less hypotonic to the beetroot cell membrane. But when they did get through‚ some made more damage to the cell than the more concentrated
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SBI3UE Examination Notes By: Gursangat Sidhu and Derek Meng Unit 1 - The Cell Unit 2 - The Chemical Basis of Life Part 1 - Molecules of Life Part 2 - DNA Replication and Protein Synthesis Enzymes DNA Structure DNA Replication Protein Synthesis Overview Transcription Translation Mutations Part 3 - Cellular Respiration and Photosynthesis Unit 3 - Genetics Unit 1 - The Cell Cell Theory: Cell theory: refers to the idea that cells are the basic unit of structure in every living thing. It states
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in the papilla. From the cortex to the papilla there is an increasing hyper osmolarity of the interstitial fluid. Cortico papillary osmolarity gradient. Urine with osmolarity more than 300mOs/l is hypertonic. Urine with osmolarity 300mOs/l is isotonic. Urine of osmolarity below 300mOs/l is hypotonic. How is cortico papillary gradient is made 1. Counter Current multipliers Descending part of loop of Henley is thin and ascending is thick. Osmolarity in plasma is 300mOs/l. 65% of the
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If there is any update‚ it will be posted no later than this Saturday (2/8/14) Identify the following individuals’ major contributions to science Ehrlich – magic bullet Hooke –cell theory and microscope Jenner - cowpox Lister- disinfectant (phenol) Koch- kochs postulate Lancefield- immunology to classify via serotypes Linnaeus- nomenclature Pasteur- pasteurization‚ vaccine‚ microbes in nonliving matter‚ aseptic techniques‚ fermentation. van Leeuwenhoek- described live organisms with Hooke’s microscope
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Exercise 1: Cell Transport Mechanisms and Permeability Worksheet Student Name: Student ID# Student instructions: Follow the step-by-step instructions for this exercise found in your lab manual and record your answers in the spaces below. Submit this completed document by the assignment due date found in the Syllabus. Rename this document to include your first and last name prior to submitting‚ e.g. Exercise1_JohnSmith.doc. Please make sure that your answers are typed in RED. Grading:
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Abstract The purpose of this experiment was to test different solute concentrations on the rate of osmosis. Artificial cells were filled with different solute concentrations and placed in water and weighed at equal time intervals to show how the water moves across cell membranes and down its concentration gradient into the lower concentrated area. The weights of the cells were recorded each interval‚ and then the rate of osmosis was found by calculating the corrected cumulative change in weight
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