concentration occurs because the higher the concentration of the sucrose the faster the rate of osmosis occurs. In the experiment there are 3 other reactions that are present are hypertonic‚ hypotonic and isotonic. Hypertonic is when the cell loses water‚ hypotonic is when the cell gains water and isotonic is when the cell does not gain or lose water. I predict that each cell will become heavier and heavier after each weigh in every 10 minutes. The experiment that my lab partners and I did was make 4 cells
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Nucleus- The nucleus is the control center of the cell. This is where DNA is contained. This is like the town hall or the mayor’s office because it is the control center of a town. The nucleus uses DNA like a city uses blueprints to direct the production of protein. Nucleolus- The nucleolus is where ribosome is made and is rich in RNA content. It is located inside the nucleus. A mayor is like this because the mayor makes everything in the town happen. He also works from the town hall‚ or works
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This is a practice test for biology 101 test 2. You should also review all lectures and practice writing questions for each lecture set. You will also want to take advantage of the test banks under the “Lessons” tab in Angel. In addition to these sample questions and the test banks‚ you are advised to study the diagrams from all chapters and be able to label main structures. 1) The function of the rough endoplasmic reticulum(RER) is: a) Digestion b) Support c) DNA isolation d)
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Physioex 9.0 Review Sheet Exercise 1 Cell Transport Mechanisms and Permeability Name: Jeffery Cook Lab Time/Date: 12pm 2/09/2015 Activity 1 Simulating Dialysis (Simple Diffusion) 1. Describe two variables that affect the rate of diffusion. a. Two variables that affect the rate of diffusion are size and whether or not there is an electrical or concentration gradient. 2. Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction
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Bio112 Lecture Quiz- 10/9/2010 Answer Key 1. The scientific study of life is called: A. biology B. ecology C. anatomy D. biochemistry E. limnology 2. Human beings are _______________ because they are composed of many cell types. A. unicellular B. acellular C. asymmetrical D. autotrophic E. multicellular 3. A/an _______ is composed of a group of similar cells that perform a particular function. A. organ B. system C. organism D. tissue E. population 4. Choose the CORRECT order (1-5) of increasing
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Chapter 1 An Introduction to the Human Body Anatomy – science of body structures and relationships among structures Physiology – science of body functions SIX LEVELS OF BODY ORGANIZATION (Given in order smallest to largest) Chemical level a. atoms – smallest unit of matter that participates in chemical reaction b. molecules – two or more atoms joined together c. Several atoms are essential for life: Carbon‚ Hydrogen‚ Oxygen‚ Nitrogen‚ Phosphorus‚ Calcium‚ Sulfur d. Examples of biological
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Na concentration with an absorbency rate of 2.091% and the lowest amount of hemolysis occurring WATER FLOW ACROSS CELL MEMBRANES pg.3 in the 0.897% Na or isotonic solution with an absorbency rate of 1.657%. Therefore it can be said that water will always move
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concentration of solute within the cell than out‚ it is called hypertonic. When a solution has a lower concentration of solute within the cell than out‚ it is called hypotonic. And when there are equal concentrations inside and out of the cell‚ it is called isotonic. The relative osmotic concentration can be determined by a change in mass of the tissue. The purpose of this experiment is to calculate the mass/change in mass of plant tissue‚ in our case potato tubers. The change in mass of the potato tuber disk
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AP Reading Guide Fred and Theresa Holtzclaw Chapter 7: Membrane Structure and Function Name_______________________Period___________ Chapter 7: Membrane Structure and Function Concept 7.1 Cellular membranes are fluid mosaics of lipids and proteins 1. The large molecules of all living things fall into just four main classes. Name them. 2. Explain what is meant when we say a molecule is amphipathic. 3. In the 1960s‚ the Davson-Danielli model of membrane structure was widely
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Beaker #1‚ which is filled to 200 mL of tap water? My prediction is that there will be no change in the weight. Since solutions that contain the same concentrate of solute particles per volume of a solution that than within the cells are said to be isotonic solutions‚ which means the concentration of a solute particles is the same on
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