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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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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All living matter is made up of cells. A single human being has as many as the stars in a galaxy‚ about one hundred thousand million. The various cells – e.g. muscle cells‚ kidney cells and nerve cells – act together in an intricate system in each one of us. Through pioneering discoveries concerning the water and ion channels of cells‚ this year’s Nobel Laureates Peter Agre and Roderick MacKinnon‚ have contributed to fundamental chemical knowledge on how cells function. They have opened our eyes
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observations) are the Cell Theory‚ and the Theory of Evolution by Natural Selection. Most scientific Theories have two components: the pattern component and the process component. What are the two components of Cell Theory and of the Theory of Evolution by Natural Selection? What are the two conditions required by the process component of evolutionary theory? (a.) The Cell Theory Pattern: “All organisms are made up of cells” Process: “All cells come from pre-existing cells” The Theory
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carrier protein transports specific substances across the cell membrane cell recognition protein The process in which a cell recognizes or identifies its environment channel protein forms channels for substances to move across a membrane concentration gradient a gradual change in the concentration of solutes in a solution as a function of distance through a solution. crenation A process resulting from osmosis in which red blood cells‚ in a hypertonic solution‚ undergo shrinkage and acquire
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ATP supply. Eventually‚ the cells begin to die‚ and become leaky. Sodium slowly begins to leak into the cells and potassium leaks out. B) The cellular process that is normally affected when the heart stops beating is aerobic respiration. Glucose begins the process in glycolysis and oxygen is required for reactions in the mitochondria. Carbon dioxide is then produced as a byproduct‚ which is a waste that requires to be excreted. When Carbon dioxide level inside the cell rose and PH began to drop‚
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Self-feeding) * Response to the environment: Respond to stimuli (perceived or not) * Perceived: sound‚ touch‚ smell‚ sight‚ temp * Not: Gravity * Reproduction: Sexual vs. Asexual * Asexual: One parent‚ no joining of gametes (sex cells) * Bacteria‚ many plants are capable of asexual reproduction * Fast‚ every individual can reproduce * Don’t have to find a mate * No genetic diversity * Sexual: Two parents‚ joining of gametes (egg and
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During which phase of the cell cycle does DNA duplication‚ or replication‚ take place? – interphase When a double helix of DNA is replicated‚ two complete helices are formed. Together‚ these helices are called sister __________. – chromatids During which phase of mitosis do sister chromatids line up at the center of the cell? – metaphase During which phase of mitosis do the sister chromatids move apart? – Anaphase During which phase of mitosis do nuclear envelopes and the nucleoli reappear?
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effects of sugar‚ salt and distilled water on white blood cells and platelet cells suggest for further research that if salt have an impact on erythrocyte size changes‚ does it have the same relation with other cells such as cancer cells. For further research‚ the specific range of the osmolarity and hemolysis sudden drop should be investigated because 200 to 250 osmolarity is still a wide range of numbers. To understand the exact point of cell osmolarity function‚ that number should be looked more
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Brittani Wright 1. a) Define a cell. A cell is the basic unit of life b) What is a unicellular organism? An organism that consists of only one cell c) Can a cell be multicellular? No because a cell is the smallest unit of life‚ cells can however join together to start forming something else 2. a) What is a difference between prokaryotic and eukaryotic cells? b) What is one significant similarity? Prokaryotic cells do not have a neucleus and Eukaryotic cells do have a nucleus. One similarity
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