ACTIVITY 1 Simulating Dialysis (Simple Diffusion) 1. Describe two variables that affect the rate of diffusion. __The size and the concentration. ___ 2. Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction? __ The molecules were to large to go through. My results matched._ 3. Describe the results of the attempts to diffuse glucose and albumin through the 200 MWCO membrane. How well did the results compare with your
Free Diffusion Molecular diffusion Osmosis
degrees Celcius. Based on the melting range found‚ the unknown substance was narrowed down to be one of two known pure compounds – Urea or trans-Cinnamic Acid. The unknown was then mixed with approximately equal amounts of each of the two likely known compounds and the mixture melting point of each was noted. The melting range of the mixture of the unknown and Urea was unchanged and the mixture of the unknown with trans-Cinnamic Acid dropped drastically to 95.7- 97.2 degrees Celcius. Compound/Unknown
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nitrateAmmonium Nitrate How they are manufactured? Ammonium nitrate is made commercially by passing ammonia gas (NH3) and a water solution of nitric acid (HNO3) through a pipe. The ammonia combines with the nitric acid to form ammonium nitrate. The formula for this reaction can be written as NH3 + HNO3 → NH4NO3. Large amounts of heat are released during the reaction‚ so the pipe and supporting equipment must be very strong. The solution of ammonium nitrate in water is allowed to evaporate‚ leaving
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Water‚ nitrogenous waste (urea‚ uric acid)‚ ions‚ nutrients‚ small molecules * NOT: Plasma proteins‚ large molecucles (kung meron sa urine‚ there is something wrong with your glomerulus!) REABSORPTION – Moved from tubule lumen back into blood system * Bowman’s capsule‚ proximal tubule‚ descending loop of henle‚ ascending loop of henle‚ distal tubule‚ collecting duct * Passive: No energy required‚ down their concentration gradient into blood * Water‚ Urea and many ions including
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Citrate Test: Some bacteria can use citrate as a source of carbon. To test if the unknown bacteria uses citrate as a source of carbon‚ Simmon’s citrate agar was used as the medium on which the bacteria was grown. The Simmon’s citrate agar consists of sodium citrate as the source of carbon‚ ammonium dihydrogen phosphate as the source of nitrogen along with pH indicator such as bromothymol blue. Procedure: The Citratase activity was detected by inoculating the unknown bacteria on the slant surface
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concentration gradient the greater the diffusion rate due to molecules moving from areas of higher concentration to areas of lower concentration. • Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction? My prediction was correct. The molecular weight of urea is 60.07 and is to great to pass through the 20MWCO membrane. • Describe the results of the attempts to diffuse glucose and albumin through the 200 MWCO membrane
Free Diffusion Molecular diffusion Osmosis
1. The constituents of plasma‚ interstitial fluid‚ and intracellular fluid are identical‚ but the quantity of each substance varies among the compartments. The most striking differences are the low protein content in interstitial fluid compared with intracellular fluid and plasma and the fact that sodium and chloride ions are largely extracellular‚ whereas most of the potassium ions (approximately 90%) are intracellular. This unequal distribution of ions results in a voltage difference across cell
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materials throughout the body. Excretion Highly developed kidneys that help control the composition of body fluids. Kidneys extract nitrogenous wastes from the blood in the form of urea‚ urea other wastes and water combine to form urine. The kidneys of mammals help maintain homeostasis by filtering urea from the blood‚ as well as by excreting excess water or retaining needed water. Response Brain consists of three main
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into ash. You can then just wipe it up easily with a damp cloth (after it cools of course). 7. Urine contains appreciable quantities of urea but almost no ammonia. Upon standing‚ urine specimens develop the odor of ammonia. Explain why this odor develops. The odor develops because of the bacteria present. The bacteria usually increase the pH as they break down urea to ammonia. Another factor involved is high acid levels. Ammonia release can occur when the body is too acidic. Ammonia smell is from
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By speed post F.No. 2-35/ 2009-AHT/FF Government of India Ministry of Agriculture Department of Animal Husbandry‚ Dairying & Fisheries 406‚ B-Wing‚Shastri Bhavan‚ New Delhi-110001 Dated 7th December 2009. Subject:- Cattle Feed (Regulation of Manufacture and Sale) Order‚ 2009. ********** Please find enclosed a final draft on Cattle Feed (Regulation of Manufacture and Sale) Order‚ 2009 for necessary comments/
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