Ethylene Glycol‚ each measured at a different temperature(C)‚ and timed to see how many seconds hemolysis would take. Results of this lab do support the proposed hypotheses‚ as hemolysis did occur to the red blood cells introduced to both hypotonic solutions of NaCl‚ and the rate at which hemolysis took place was much more rapid as the temperature was increased. The solution with the most rapid hemolysis time was 0.18% NaCl and following close behind was the 0.45% NaCl. This makes sense because
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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 differentially permeable some substances pass through freely while other do not-small uncharged molecules pass through the cell membrane following their concentration gradient diffusion movement of molecules
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hypothesized that osmosis will occur when there is an uneven distribution of solute in a solvent. The more abundant the solute is in solvent‚ the higher the rate of osmosis through the diffusion gradient forming a hypertonic or hypotonic solution. Solvent with equal or no solute forms an isotonic solution. Throughout this lab‚ data was collected and compiled to analyze these effects across selectively permeable membranes. The results indicated that the water molecules indeed move from high concentration
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change in mass Exercise 1D 1) If a potato core is allowed to dehydrate by sitting in the open air‚ would the water potential of the potato cells decrease or increase? As it dehydrates‚ the solutes become more concentrated so the solute potential becomes more negative and it decreases. 2) If a plant cell has a lower water potential than its surrounding environment and if pressure is equal to zero‚ is the cell hypertonic (in terms of solute concentration) or hypotonic to its environment? Will the cell
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NaCl‚ an influx of water occurs: the cells swell‚ the integrity of their membranes is disrupted‚ allowing the escape of their hemoglobin in the process of hemolysis because the solution is hypotonic. When 0.7% NaCl was added to the bloods‚ there is no net influx or efflux of water because the solution is isotonic. When 0.16 M NaCl was added to the bloods‚ the cells lose their normal biconcave shape‚ undergoing
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1. Different methods to administer IV drugs include: 1. As mixtures within large volumes of IV fluids 2. By injection of a bolus or small volume of medication through an existing IV line or intermittent venous access 3. By “piggyback” infusion of a solution containing the prescribed medication and a small volume of IV fluid through an existing line 2. An IV bolus is when you administer a small amount of fluid directly into the systemic circulation in order to deliver the medication. 3. Volume
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CHAPTER CHEICAL BASIS OF LIFE OUTLINE The human body is composed of chemicals. Chemistry describes the composition of substances & how chemicals react with each other. STRUCTURE OF MATTER ELEMENTS are composed of atoms‚ which are the smallest unit of element MATTER is composed of elements ATOMIC STRUCTURE • A complete atom is electrically neutral • Atom consists of elements‚ protons‚ & neutrons • Electrons are negative charge & • Neutrons are uncharged( neutral) • Atomic number is equal
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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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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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