in/out of cells they must be small. high surface area: volume ratio. the larger the cell..the longer diffusion Diffusion- when a substance spontaneously moves from an area of high [ ] to an area of low [] osmosis- when H2o moves across a selectivly permeable membrane from an area of high [ ] to an area of low [ ] cell reproduction- the general process by which new cells are formed cell division- the process by which a parent cell divides into 2 daughter cells mitosis- the process by which the duplicated
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oxygen demand‚ chemical oxygen demand. This technology is already on the rise because of its efficacy and cost efficiency. Reverse Osmosis is a phenomenon wherein water is separated from a solution of dissolved solids by the solution through a semi permeable membrane under an external pressure. The external pressure usually provided with the help of a pump is required to overcome the osmotic pressure or the atmospheric pressure. Due to this molecules with lower molecular
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CNS Lecture 03rd October Resting Membrane Potentials Dr Penny Murphy Objectives The student should be able to: Describe the basic building blocks of the central nervous system. Explain what a “resting membrane potential” (RMP) is and how it is generated. Include the characteristics of the phospholipid bilayer‚ leak membrane channels and the diffusion of K+ ions‚ and the role of the Na+/K+ ATPase pump. Explain how and why increasing the permeability of the membrane to Na+ ions will
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CHAPTER 2 RECOVERY EFFICIENCY OF AN EOR METHOD 2.1 SWEEP EFFICIENCY The overall recovery factor (efficiency) RF of any secondary or tertiary oil recovery method is the product of a combination of three individual efficiency factors as given by the following generalized expression: Fluid properties influence all three components of recovery efficiency. 1. Viscosities are found in the definition of mobility ratio‚ which affects areal and vertical sweep efficiency‚ including viscous fingering. 2
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My social group – basketball team This paper is about my social group‚ basketball team. It will be analyzed with different concepts in the following. To begin‚ I will mention background information. Then‚ I will describe the cohesiveness of our team with group size‚ initiations‚ cognitive dissonance and time. Lastly‚ I will explain why I do not exit the group with three structural factors‚ group permeability‚ status stability and legitimacy. My team has established in 2000 and I joined it in
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BIOLOGY – TRANSPORT ACROSS MEMBRANE define diffusion and describe its role in nutrient uptake and gaseous exchange in plants and humans define osmosis and describe the effects of osmosis on plant and animal tissues define active transport and discuss its importance as an energy-consuming process by which substances are transported against a concentration gradient‚ as in ion uptake by root hairs and uptake of glucose by cells in the villi . A cell is surrounded by a layer of cell surface membrane
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Case Analysis of Intel Corporation – Leveraging Capabilities for Strategic Renewal Dorothy Thornton Concordia University Portland Technology is a constantly shifting market and Intel is an organization which has adapted their corporate culture and vision to meet the demands of these changes. In the 1980’s Intel’s vision was a performance driven organization focused on new product development with action orientation from the front lines (Bartlett & Nanda‚ 1994). According to John P Kotter (1995)
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Similarily negative feedback also controls Osmoregulation‚ if osmoreceptors detect change in the concentration of the blood‚ for example it may be too high the hormone ADH is released which targets the distal convulated tubule‚ causing it to become more permeable to water so that more is reabsorbed into the blood‚ reducing the concentration. Negative feedback is also a crucial part of controlling blood glucose levels‚ for example if the islets of Langerhans detect a fall in blood glucose levels‚ the alpha
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cell wall protects the cell and strengthens the cell. Cell membrane Controls the chemical movement in and out of the cell. It is crucial to the cells survival as an internal balance of chemicals needs to be maintained. As the membrane is semi-permeable this allows some substances to pass through freely‚ but others cannot. Here the process of diffusion takes place. Diffusion Substances dissolved in water move naturally from areas where there are large amounts to scarce areas. An example could
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The Mitochondrion The cell is the most basic unit of life. The cell serves as the place for processes such as cellular respiration‚ metabolism and energy production in the form of ATP‚ or adenosine triphosphate. Many organelles—small structures that help to carry out the daily operations of the cell‚ inhabit the cell such as the Golgi complex‚ the endoplasmic reticulum‚ the nucleus‚ or brain of the cell‚ and lysosomes. An organelle that is the place where most of the cell’s energy is generated is
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