cell membrane‚ which is a semi-permeable‚ meaning that only some things and not others can pass through it (Purchon‚ N‚ 2000). If there is a higher concentration on the outside of the cell than on the inside of the cell then it is referred to as hypotonic. When this happens‚ water flows from outside the cell into it‚ and the cell starts to swell. When the cell swells it is said to be turgid‚ which means swollen and hard (Etomica‚ 2010). In plant cells there is a cell wall which prevents these cells
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diversity Why are cells small? Prokaryotic vs eukaryotic cells Plant vs animal cells- organelle function and location Cell membrane structure and function Diffusion‚ facilitated diffusion‚ active transport‚ endocytosis‚ exocytosis Osmosis- hypertonic‚ hypotonic‚ isotonic environments Unit 4- Cellular Energy (ch. 8) Laws of Thermodynamics Metabolism- Anabolism vs catabolism Formation of ATP Photosynthesis Chemical Equation Structure of a chloroplast Chlorophyll a vs accessory pigments Light dependent reaction-
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inside the cell‚ water will move from the inside of the cell to the outside in order to establish water balance. When a cell is placed in a solution containing more solutes than present in the cell‚ the solution is referred to as a hypertonic solution. In a hypotonic solution however‚ the water moves into the cell as a result of more solutes being present in the cell than outside
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Chapter 1 - Scientific Methods Objectives 1. Demonstrate a basic knowledge of classroom/science safety. 2. Understand the purpose of a hypothesis‚ and identify when a hypothesis should be used. 3. Be able to identify the independent and dependent variables in a formalized hypothesis. 4. Differentiate between an observation and an inference. 5. Contrast quantitative and qualitative observations. 6. Given a data table‚ draw and label a graph. Including a title‚ labeled units‚ and legend. 7
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Cell Membrane Permeability and Osmosis Experiment 3 Objectives: To demonstrate the mechanism involved in Osmosis; To demonstrate the tonicity of solutions by subjecting the cells to different concentration of solute. To view‚ under the microscope‚ any change in the shape and volume of the cells after subjecting them to different concentrations of solutes; To demonstrate the permeability of cell membrane by subjecting the cells to different solutes; To demonstrate the mechanism involved in
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A red blood cell placed in a hypotonic solution will burst (lyse). A red blood cell placed in an isotonic solution will remain the same (will not swell or shrink). The Cell Cycle: G1(growth 1)‚ S(synthesis)‚ and G2(growth 2) phases are collectively called interphase. Prophase – the nuclear envelope disintegrates and
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2. Draw and completely label a cell membrane. [pic] 4. List and briefly discuss the 5 components of cellular membranes. 1. Phospholipids layer- 2 layers ‚ polar and non polar ‚ polar facing the extracellular fluid and cytoplasm 2. Transmembrane proteins-integral membrane proteins are proteins that expand the membrane 3. Interior protein network-peripheral proteins are in the interior side of the membrane 4. Cell surface markers are glycolipids‚ carbohydrates/lipid
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body is breathing -Osmosis: movement of only water through a semipermeable membrane across a concentration gradient -Active Transport: transport with the use of energy (ex. sodium and potassium pumps) -Hypotonic Solution: lower solute concentration -Hypertonic: higher solute concentration -Isotonic: equal concentration -Sodium moves out of the cell/ Potassium moves into the cell -Phosphorus move out of the cell/Calcium moves into the cell -Kidneys and the Endocrine System work together using three
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Osmosis Experiment Diana Arrowood Grand Canyon University BIO-100L Biology Concepts September 16‚ 2011 Osmosis Experiment Directions Use the information below to complete the Osmosis Experiment. Materials 1 fresh baking potato Water Salt Four small containers (i.e.‚ drinking cups or clear glasses) A metric ruler Methods and Procedure 1) Place 1 cup (236 ml) of water in each of the 4 containers. In 2 of the containers‚ add 1 tablespoon (14.8 ml) of table salt and mix well until
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larity------------------------------------------------- Names: Benjamin Fischmann ------------------------------------------------- ------------------------------------------------- ------------------------------------------------- What is the Molar Concentration (Solute concentration) of a Potato? ------------------------------------------------- ------------------------------------------------- ------------------------------------------------- Design -------------------------------------------------
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