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Diffusion
Diffusion

... The diffusion of water across a selectively permeable membrane is called osmosis. Regulating the water flow through the plasma membrane is an important factor in maintaining homeostasis within a cell. Most cells whether in multicellular or unicellular organisms, are subject to osmosis because they a ...
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... PA is carrying deoxygenated blood to the lungs. PAcapillariescarbon dioxide diffused into the alveolioxygen diffuses into the capillariesPVein 3) Circle the part of the diagram that shows oxygen poor blood from the body entering the capillaries surrounding the alveolus. 4) Draw a square around t ...
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... Explain how the properties of life emerge from complex organization. With each step upward in the hierarchy of biological order, novel properties emerge that were not present at the simpler levels of organization. These emergent properties result from interactions between components. A molecule such ...
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... When poisoning its victims, Marine Cone Snails release toxins that are made of various chemicals, specifically, amino acids. These amino acids act as ligands that usually binds to the ion channels (transmembrane) of the victim’s cells. The toxins from the snail close the channels and inhibit the dif ...
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... Oenococcus oeni is an important bacterial species used for malo-lactic (ML) fermentation in the wine industry. ML fermentation is a secondary fermentation in wine in which malic acid (a naturally occurring acid in grapes) is converted to lactic acid, and occurs after the primary alcoholic fermentati ...
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... piled one on top of the other. The walls of the smallest blood vessels, called capillaries,are composed of a single layer of epithelial cells. The permeability of capillaries allows exchange of substances between the blood and tissue cells. The nose, mouth, esophagus,anal canal, and vagina are all l ...
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... pH, glucose concentration and water). 1. Annelids have two excretory structures, called nephridia, per segment. The nephridia gather wastes from the body cavity and surrounding blood vessels. The waste is excreted through a pore in the following segment. 2. Insects eliminate wastes by collecting cir ...
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Diffusion, osmosis and transport of substances in cells

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... automatically. Moving them does not involve any thought and you DO NOT have control over these muscles. MAIN FUNCTIONS The muscular system allows the body to move when attached to bone and permits movement in internal organs, such as the heart and intestines. It also provides strength, posture, bala ...
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Five Paragraph Essay

... Animals, however grow by making new cells all over their body, and when an animal first develops as an embryo, almost all cells are dividing together. Later, as the animal reaches adulthood, most cells are not dividing. Some tissues, such as skin, divide ...
BIO Cell Theory
BIO Cell Theory

... generation, the idea that life could come from nonliving things. • This was disproved through the experiments of Francesco Redi and Louis Pasteur. • However, because the microbes that Pasteur theorized caused spoilage were too small to see, his ideas were not easily accepted. ...
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Organ-on-a-chip

An organ-on-a-chip (OC) is a multi-channel 3-D microfluidic cell culture chip that simulates the activities, mechanics and physiological response of entire organs and organ systems. It constitutes the subject matter of significant biomedical engineering research, more precisely in bio-MEMS. The convergence of labs-on-chips (LOCs) and cell biology has permitted the study of human physiology in an organ-specific context, introducing a novel model of in vitro multicellular human organisms. One day, they will perhaps abolish the need for animals in drug development and toxin testing.Although multiple publications claim to have translated organ functions onto this interface, the movement towards this microfluidic application is still in its infancy. Organs-on-chips will vary in design and approach between different researchers. As such, validation and optimization of these systems will likely be a long process. Organs that have been simulated by microfluidic devices include the heart, the lung, kidney, artery, bone, cartilage, skin and more.Nevertheless, building valid artificial organs requires not only a precise cellular manipulation, but a detailed understanding of the human body’s fundamental intricate response to any event. A common concern with organs-on-chips lies in the isolation of organs during testing. ""If you don’t use as close to the total physiological system that you can, you’re likely to run into troubles"" says William Haseltine, founder of Rockville, Maryland. Microfabrication, microelectronics and microfluidics offer the prospect of modeling sophisticated in vitro physiological responses under accurately simulated conditions.
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