and develop. The thyroid gland is located in the lower part of the neck‚ below the Adam’s apple‚ wrapped around the trachea. It has the shape of a butterfly with two lobes attached to one another by a middle part called the isthmus. The thyroid uses iodine‚ a mineral found in some foods and in iodized salt‚ to make its hormones. The two most important thyroid hormones are thyroxine (T4) and triiodothyronine (T3). The thyroid gland also makes the hormone calcitonin‚ which is involved in calcium metabolism
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the mordant iodine in a Gram staining procedure? A. A mordant causes the crystal violet to run. B. A mordant fixes the bacteria to the slide. C. A mordant keeps dye attached to an object. D. All of the above 5. What is the order of reagents used in the Gram stain? A. crystal violet‚ iodine‚ safranin‚ alcohol B. alcohol‚ crystal violet‚ iodine‚ safranin C. iodine‚ crystal violet‚ safranin‚ alcohol D. crystal violet‚ iodine‚ alcohol‚ safranin E. crystal violet‚ safranin‚ alcohol‚ iodine 6. Following
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the reader about Amylase’s ability to withstand acidic or basic pH. To do this‚ two test tubes were both filled with 5mL of a 5% amylase solution. The first one was filled with an acid‚ while the other was filled with a base. After dropping liquid Iodine and Benedict’s solution into each one‚ the tube with a basic pH tested positive for glucose. The acidic solution tested (mostly) negative for glucose‚ although there were trace amounts at the bottom. Overall‚ my conclusion is that only acidic solutions
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Part 1: INTRODUCTION TO HYPERTHYROIDISM Hyperthyroidism is a large topic so we have split it into four manageable sized portions. This page introduces hyperthyroidism. Subsequent pages are listed at the bottom which address more specific details of making the diagnosis of hyperthyroidism‚ the causes of hyperthyroidism‚ and different treatment options available for hyperthyroidism. In healthy people‚ the thyroid makes just the right amounts of two hormones‚ T4 and T3‚ which have important
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EXPERIMENT – 9 To Prove that Light is Necessary for Photosynthesis. Aim : To show experimentally that light is necessary for photosynthesis. Requirements : A potted plant‚ iodine solution‚ black paper strip‚ paper clips‚ water bath. EXPERIMENT PLEASE VIEW THE ANIMATION FILE FOR THE PROCEDURE Observation : 1) The region of the leaf which was exposed to sunlight turns blue in colour. 2) The region of the leaf covered with black strip turns brownish in colour
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bacteria. The purpose of crystal violet in the Gram’s stain procedure is to differentiate bacteria into two different groups of pink and purple colours with gram positive being purple and gram negative being pink in colour. D. What is the purpose of iodine in the Gram’s stain procedure? What is a mordant? Keeps
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the UN’s Standing Committee on Nutrition World Nutrition Situation 5th report‚ stunting‚ which is the prevention of growing or developing properly‚ affects more than 147 million preschoolers in developing countries. The same report also shows that Iodine deficiency accounts for the world’s utmost single cause of mental retardation and brain damage. The World Food Program reports that undernutrition affects school performance and studies have shown it often leads to a lower income as an adult. The
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SO4-2(aq) + H2O(l) Balance the reaction. Which substance is the oxidizing agent? What is the equivalent weight of H2O2 (Molar mass = 34.0 grams) in the above reaction? What is the normality of a 0.040 M H2O2 solution used in the above reaction? 8) Iodine reacts with thiosulphate ion (S2O3-2) in acidic solution to form iodide and tetrathionate ion (S4O6-2). Calculate the volume in mL of 0.100 M Na2S2O3 needed to react with 0.2538 g of I2. (Answer = 20.00 mL) 9) Thyroxine (C15H11I4NO4) is a hormone
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their Gram classifications. Materials Broth cultures of Staphylococcus aureus and Pseudomonas fluorescenes‚ a Bunsen burner‚ one inoculating loop‚ one clean glass slide‚ one slide dish‚ bibulous paper‚ Gram-staining materials (Crystal Violet‚ Iodine‚ Ethyl Alcohol‚ Safranin‚ DI water)‚ and a microscope. Methods Smear Preparation Obtained a clean dry glass slide‚ Staphylococcus aureus and Pseudomonas cultures. Added drop of water onto the center of slide. 3. Flame-sterilized inoculating
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drops of Lugol’s iodine solution were added to each of the test tubes. The test tubes were mixed thoroughly. Test tube 1 was placed under a flame for observation. Colour change within the test tubes were recorded. Protein test 10 test tubes were used and lab-elled. 9 of the test tubes were filled with 5ml of food sample. 3 drops of Biuret reagent were added to each of the test tubes. The test tubes were gently shaken to mix the solution. Observation of colour change was
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