Bio 30 Cell Questions Question Sheet McDougal Littell Biology Textbook – Page 70 3.1 Cell Theory 1. Explain the three major principles of cell theory in your own words. 2. What characteristics are shared by most cells? 3. How did improvements in the microscope help scientists form the cell theory? 4. How do prokaryotic and eukaryotic cells differ? 5. Today‚ scientists can study human cell grown in petri dishes. Explain how this technique builds on the work of early
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III. Research- Sport drinks are most times are divided into three groups‚ which are Isotonic‚ Hypertonic‚ and Hypotonic. They are categorized by the concentration of electrolytes. Isotonic sports drinks contain similar concentrations of electrolytes as those found in the human body. Hypertonic sports drinks contain higher concentrations of electrolytes than what is found in the body. Hypotonic sport drinks contain a lower concentration of electrolytes than what is contained in the body
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Cell Membranes and Transport Hands-On Labs‚ Inc. Version 42-0033-00-01 Exercise 1: Diffusion Observations Data Table 1: Rate of diffusion in different temperatures | | ºC | Minutes | Temperature | InitialTemp. | InitialColor | 5 | 10 | 15 | 20 | 25 | 30 | 60 | Cold | 10°celsius | clear | clear | clear | clear | clear | clear | light purple | light purple | Ambient | 25°celsius
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from the potato to move to the solution‚ thereby achieving a percentage loss in mass. At concentrations such as 0.0molL-1 and 0.9molL-1‚ the concentration gradient is steeper; therefore the rate of diffusion is quicker. For the potato chips in the hypertonic 0.9 sucrose solution‚ the concentration of water molecules in the potato chip cells is greater than the water molecules in the 0.9 sucrose solution. This means that through the process of osmosis‚ water molecules will move from the potato cell through
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Key Terms Active transport: membrane proteins use cellular energy (usually ATP) to move molecules or ions across a plasma membrane against their concentration gradient. Allele: different forms of a gene • genotype – the combination of alleles in an organism. Aquaporin: a specialised channel protein in the plasma membrane of a cell‚ which is selectively permeable to water. Attachment protein: a protein in the plasma membrane of a cell that attaches either to the cytoskeleton inside the cell‚
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of blood plasma‚ not of total body water. Bothe are regulated through independent mechanisms in humans and should not be conflated. Some authors have reported three types of dehydration based on serum sodium levels : hypotonic or hyponatremic‚ hypertonic or hypernatremic‚ and isotonic or isometric. Indeed‚ in humans‚ it has been commonly thought that the most commonly
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The purpose of this lab was to observe the rate of osmosis and diffusion‚ as well as the effect of molecular size of the particles on this rate. Part I of the lab was a demonstration of osmosis and diffusion‚ that dealt with raisins in different liquid environments‚ each with a different concentration of sugar. Part IV of the lab was using the same idea as the demonstration‚ by putting objects in different concentrations of a substance; in this case elodea leaves in salt water. In both cases‚ the
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potential. 2. When the two solutions on either sides of the membrane are equal and no net movement is detected‚ the solutions are isotonic. This means that the solutions have the same concentration of solutes. If two solutions differ in the concentration of solutes that each has‚ the one with more solute is hypertonic. The solution that has less solute is hypotonic. 3. This experiment was performed to measure the osmosis of small molecules through cellulose bag (has the same structure that plant
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cells have selectively permeable membranes‚ meaning certain substances can flow through the membrane‚ this allows osmosis to happen to cells in certain solutions. Osmosis can affect the cell in three different types of ways. The cell can become hypertonic‚meaning the concentration
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Identify causes of specific types of hyponatremia and hypernatremia‚ including drug-induced causes * Hyponatremia * Hypotonic: Renal and Nonrenal Losses‚ Polydipsia‚ SIADH‚ HypOthyroidism‚ CHF‚ Cirrhosis‚ Adrenal insufficiency‚ Nephrotic Syndrome/CRF * Isotonic: Hyperlipidemia‚ Hyperproteinemia * 275-290 mOsm/L * Hypertonic: Hyperglycemia‚ Mannitol‚ Sorbitol * >290 mOsm/L * Hypernatremia * Hypovolemic: Free water loss
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