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DENT 1120 Related Anatomy Unit 2 Cells & Tissue
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1. Cell Characteristics 3 PARTS: NUCLEUS, MEMBRANE, CYTOPLASM (contains organelles)
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CELL
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2. List the function of the following 7 organelles 1. Ribosome 2. Endoplasmic Reticulum (ER) 3. Golgi 4. Lysosome 5. Mitochondria 6. Centrioles 7. Cilia and Flagella
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3. Compare Active and Passive Transport This is how materials get into a cell, through the membrane. ACTIVE-molecules move from an area of low concentration into an area of high concentration. Requires energy and a carrier molecule. (Like forcing more water into an already full sponge)
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Passsive transport Diffusion- molecules move from an area of high concentration into an area of low concentration Osmosis- diffusion of water( like putting a dry sponge on a puddle of water) Filtration- selectively allowing some molecules to pass (like a coffee filter lets water in but keeps grounds out)
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4. Osmosis Cells placed in HYPERTONIC( solute concentration greater than cell, thus less water) Water leaves cell and cell SHRINKS Cells placed in HYPOTONIC ( solutes less than cell, thus more water) Water is pushed into cell and cell SWELLS Isotonic- = amts of water and solutes
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Osmotic Pressure
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5. List and describe the 4 phases of MITOSIS (PMAT) 1. Prophase- genetic material duplicates 2. Metaphase- chromosomes line up in middle 3. Anaphase- chromosomes migrate away from the middle 4. Telophase- cell membrane forms across middle to form 2 cells
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Cell Division Mitosis- all body cells 46 chromosomes Meiosis- egg and sperm, 23 chromosomes
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The End
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