molecule that can diffuse freely in a cell. Other molecules need assistance through the cell membrane through a process called facilitated diffusion. Osmosis moves from an area of low concentration to high concentration. In osmosis water moves in the opposite way. Water flow is determined by the concentration‚ not the nature of the solute. There are a couple of things to consider for diffusion to work. The size of the cell‚ permeability‚ molecules in the cell‚ and time it takes to diffuse. Processed
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Hi! My name is Rafael‚ the Red Blood Cell‚ doctors call me erythrocyte and born in the bone marrow. My shape is bi-concave disk. Also do not possess a nucleus. I am one of trillions of red blood cells that live inside and travel through your body. I deliver oxygen to all the organs and tissues and transport wastes as carbon dioxide out of your body. Oxygen helps keep the body running and healthy. I tend to jump aboard the train inside the heart. The trip around the body only takes 45 seconds
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Question: Describe the path taken by a red blood cell as it passes from the left atrium to the cells in the cell kidneys and back to the left atrium Answer: The red blood cells enter through the right atrium and there the blood color is blue. Next‚ it goes through the right ventricles‚ and then to the pulmonary artery. After goes through those valves‚ it then goes through the lungs‚ and the lungs turn the blood into red‚ thus stating that it contains oxygen. Pass the lungs‚ and then into the pulmonary
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sources: human‚ animal‚ and recombinant. Human hemoglobin is obtained from donated blood that has reached its expiration date and from the small amount of red cells collected as a by-product during plasma donation. b. Perfluorocarbon(PFC) PFCs are synthetic hydrocarbons with halide substitutions and are about 1/100th the size of a red blood cell. These solutions have the capacity to dissolve up to 50 times more oxygen than plasma. Because PFC solutions are modified hydrocarbons‚ however‚ they do
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A STUDY ON ONIONS Onions can be found all around the world‚ from Asia all the way to the Americas. They are edible used by professional chefs all over the world as garnishes or as a main dish‚ though not very widely consumed in this way. Not just it’s bulb can be eaten‚ it’s shoots and leaves are edible as well. They have a distinctive‚ strong flavour and also a pungent odour that could be neutralized and sweetened by cooking or heating. It has a dry‚ paper-like skin and a juicy‚ fleshly‚ layered
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Osmosis Aim: To determine the concentration of cell sap in a potato cell. Osmosis is the movement of water through a semi-permeable membrane. It starts from a weak solution and becomes a more stronger solution until the concentrations on both sides are equal. To investigate the range of solutions needed to find the point at which the surrounding solution is the same as the cell sap in the vacuole.
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Syllabus Cambridge O Level Biology Syllabus code 5090 For examination in June and November 2011 Note for Exams Officers: Before making Final Entries‚ please check availability of the codes for the components and options in the E3 booklet (titled “Procedures for the Submission of Entries”) relevant to the exam session. Please note that component and option codes are subject to change. Contents Cambridge O Level Biology Syllabus code 5090 1. Introduction ............................
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The effect of salt concentrations on the mass of the pear cubes ‘Pyrus’ after being soaked in water Aim: The effect of salt concentrations on the mass of the pear ‘Pyrus’ pieces shaped as cubes of 1cm. Background: Osmosis is the net movement of water molecules through a semi-permeable membrane from an area of higher water potential to an area of lower water potential. Water makes up to 70-90% of living cells and cell membranes are partially permeable membranes. Dissolved substances attract
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Alengasa‚ 2009). Mild cases of athlete’s foot are improved by keeping the feet dry and using foot powder especially between the ties and changing socks frequently. Foot powder relieves itching and absorbs moisture on the feet. It also soothes irritated skin and prevents foot odor by controlling odor-causing bacteria. Applyinf foot powder will lessen the presence of bacteria especially if the powder contains Calamansi. Calamansi could be a good antibacterial agent in removing bacteria because of its acidic
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http://thegrabup.com/?p=811 Significance Of Osmosis (700-1200) Osmosis is a process of movement of solvent through a semi permeable membrane from an area of high water concentration to an area of low water concentration to equalize the concentration of solute to both side of the membrane. . Water is sometimes called "the perfect solvent‚" and living tissue (for example‚ a human being’s cell walls) is the best example of a semipermeable membrane. Osmosis process as demonstrated below shows that when
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