water potential‚ and equilibrium were also concepts that were delved into in this lab. Understanding how diffusion and osmosis works is essential to understanding biology. Each time a cell has something move into or out of it‚ some sort of principle studied in this lab is occurring. Diffusion‚ osmosis‚ and passive and active transport are all fundamental concepts of Biology. This lab simulated osmosis in the cell. In this case‚ we used dialysis tubing to simulate the semi-permeable membrane of an
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envelope 2. Endoplasmic reticulum (ER) a. Rough ER-has ribosomes b. Smooth ER-lacks ribosomes 3. Golgi apparatus 4. Lysosomes 5. Vacuoles a. food vacuole b. contractile vacuole c. central vacuole 6. Plasma membrane D. Mitochondria E. Chloroplasts F. Peroxisomes G. Cytoskeleton (Table on page 113) 1. Microtubules a. cilia b. flagella 2. Microfilaments (actin) a. muscle contraction b. pseudopodia c. cyotplasmic streaming
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the movement of osmosis through a selectively permeable membrane‚ in this case potato. Introduction: Osmosis is the movement of water through a semi permeable membrane‚ separating solutions of different concentrations. The water passes from a region of high concentration to a region of low concentration‚ until the two concentrations are equal in concentrations of water. Many cell membranes behave as semi permeable membranes‚ and osmosis is a vital mechanism in the transport of fluids
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“The Ideal Person” Nietzsche’s Ubermensch concept of the “ideal person” was able to achieve self-actualization‚ and has developed himself holistically. What Nietzsche meant by achieving self-actualization was to achieve one’s full potential through creativity‚ independence‚ spontaneity‚ and a grasp on the real world. I see an ideal person as someone who surrounds themselves with happiness and love even with no money or fame. Most people consider the ideal person beautiful and rich. But as
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Human Cell‚ protein production‚ cell organelles and the cell membrane. Structure and cell transport. The cell is the basic structural and functional unit of all known living organisms (See figure 1). It is the smallest unit of life that is classified as a living thing (except virus‚ which consists only from DNA/RNA covered by protein and lipids)‚ and is often called the building block of life. Organisms can be classified as unicellular (consisting of a single cell; including most bacteria) or
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surface-area-to-volume ratio important for a cell? List the differences between prokaryotic and eukaryotic cells (general structure‚ organelles‚ genetic material‚ etc.). What cellular processes occur in the nucleus? Why is it important for the nucleus to have two membranes and tightly regulated pores? What are these structures called? What is the difference between chromatin and chromosomes? What is the endomembrane system? What are the structural and functional differences between the rough and smooth endoplasmic
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Liposomes Definition and background10 Liposomes were discovered in the early 1960’s and subsequently studied as cell membrane models. They have since gained recognition in the field of drug delivery. Liposomes are spherical vesicles which can be thought of as a hollow sphere they are composed of a bilayer membrane which entraps an aqueous core. The particle size of liposomes ranges from 20 nm to 10 μm in diameter. Liposomes vary in charge and in size depending on their manufacturing protocol
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the main component of the cell membrane? – phospholipids Which of the following is a characteristic of the cell membrane? – semipermeable Which of the following is not a major function of proteins in the cell membrane? - forming the entire glycocalyx What part of a cell membrane is usually in contact with the interstitial fluid? - phosphate heads of phospholipids What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane? - In facilitated diffusion‚
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high concentration to an area of low concentration. For a diffusion system to be efficient‚ it should have a large surface area so that high amount of substances can be exchanged at a time. It should also have a thin membrane and a continuous supply of substances‚ as a thin membrane means that the diffusion pathway would be short‚ and the continuous supply helps maintain a concentration gradient‚ which is essential for diffusion to take place. There are two main types of diffusion; simple and facilitated
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AP BIOLOGY CELL UNIT ACTIVITY #5 NAME_____________________ DATE___________HOUR_____ CELL TRANSPORT MEMBRANE PROPERTIES PASSIVE TRANSPORT CHARACTERISTICS: DIFFUSION: Cell Unit Activity #5 page 1 OSMOSIS : ISOTONIC ANIMAL CELLS Cell Unit Activity #5 page 2 HYPOTONIC HYPERTONIC PLANT CELLS OSMOREGULATION – ADAPTATIONS Paramecium Fresh Water Bony Fish FACILITATED D IFFUSION: Cell Unit Activity #5 page 3 Marine Bony Fish ACTIVE TRANSPORT CHARACTERISTICS:
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