enclosed between the heads. However‚ this membrane is not locked together or rigid; it is selectively permeable. Selective permeability allows some substances to pass through it. The membrane is fluid‚ allowing certain molecules to pass through by diffusion. This type of passage through a cell is called passive transport‚ when no energy is required for a molecule to pass through a selectively permeable membrane. The proteins that make up parts of the cell membrane also play a key role in the transport
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of Plant Pigments Paul Ibarbia‚ Gene Paolo Jasmin‚ Gianpaolo Jimenez and Lorenzo Labicane* Department of Biology‚ University of Santo Tomas‚ Manila‚ Philippines Abstract Column chromatography of plant pigments is the separation of plant pigments extracted from Capsicum frutescens (siling labuyo). No slurry is prepared of the eluent; eluent with the stationary phase is set and then carefully poured into the column. The eluent are the solvents which are responsible for the pigments to be divided
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will be administratively dropped from the course Describe the structure of the plasma membrane. How does its structure relate to its function? Explore diffusion as a method of cell transport. What are the factors affecting cell diffusion? Osmosis and what it means for the life of a cell Case study – group work What is facilitated diffusion? Describe the impact of cell size on cell transportation. Administrative drop deadline is September 17 EXAM 1 2- 3- Sept 8 3 Sept10 4-
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photosynthesis contain two photosystems‚ two electron transport chains‚ and ATP synthase. These parts are embedded in the thylakoid membranes of a chloroplast. The photosystems contain a collection of chlorophyll molecules. Chlorophyll‚ which is the green pigment of leaves‚ absorbs light energy that excites electrons to a higher energy level. Energized electrons from photosystem I are passed down an electron transport chain and added to NADP+ to form NADPH. Electrons from photosystem II are passed down another
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contaminants that can be ingested or inhaled -Can be liquid or solid or both (e.g.‚ a liquid droplet containing a microbe). 8. Aeromicrobiological pathways – steps involved with example -Launching of bioaerosols into the air -Transport via diffusion and dispersion of these particles -deposition -ex. Spread of Influenza Virus 9. Sources of airborne particulates 10. Launching Air borne particles can be launched from o. Point source ii. Instantaneous point source
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1. Answer the questions on slide 2 What are macronutrients? • Macronutrients are nutrients that come in large amounts. They include water‚ carbohydrates‚ proteins‚ and fats. What are micronutrients? • Micronutrients are nutrients that come in small amounts. They include minerals and vitamins. How are minerals defined? What functions do they play? • Minerals are essential for the function of our cells. They are inorganic because they don’t contain any carbon. Minerals help your muscles‚ bones‚ blood
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Coaster Marbles: How much Height to Loop the Loop? 7. Surface Tensions of Water 8. Effect of Propeller Size on Thrust Produced 9. How the Bernoulli’s Principle Works for Different Shapes 10. Orange Ripening and Vitamin C 11. Diffusion and Osmosis in Animal Cells 12. The Most Affective Antacid 13. The Antigravity Lifter 14. The Effectiveness of Garlic on Fighting Bacteria 15. Can Lettuce Seeds be Used as a Bioassay for Testing Toxicity 16. Is Soil a type of Electrical
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Cell Biology Exam 1 Notes Lecture 1: Introduction to Cell Biology • Biology is studied at different levels of organization Time Scale • [Figure 1-9] How big is a cell and how big are its parts? • There are important similarities that all cells share; however‚ there are also important differences among various cell types (for example‚ animal cells vs. bacterial cells) • [Figure 3-23] The inside of a cell is loaded (crowded
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preventing infection all transported around the vessels amongst the plasma. The blood plasma contains dissolved substances including carbon dioxide‚ urea and nutrients. Red blood cells are specialized cells with no nucleus‚ containing a red colored pigment‚ haemoglobin which carried oxygen to the respiring cells in the body. They also have a biconcave shape to maximize haemoglobin storage and for flexibility through narrow blood vessels. Once the red blood cell returns to the heart‚ it enters through
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Gas exchange in animals External respiration: not to be confused with cellular respiration‚ although purpose is to provide oxygen and eliminate carbon dioxide Single-celled organisms achieve this by simple diffusion Larger organisms need specialized breathing organs Getting the air into the body is one challenge Circulatory system needed to distribute oxygen to the tissues Specialized blood cells can transport oxygen (solubility in plasma is very low) The process of breathing Air has much
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