Review Sheet Exercise 1 Cell Transport Mechanisms and Permeability Activity 1: Simulating Dialysis (Simple Diffusion) • Describe two variables that affect the rate of diffusion: Two variables that affect the rate of diffusion are size and concentration gradient. The molecular size vs the MWCO size of the membrane can either increase‚ decrease‚ or prevent diffusion. The greater the concentration gradient the greater the diffusion rate due to molecules moving from areas of higher concentration
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If Walls Could Talk I have been part of my country for more than a century. This is the country I love‚ this is where I’ve grown up‚ it is a part of me. I am associated with a story. I have brought people together and I have told about events some of which have made history. My structure is lofty‚ strong‚ consisting of thousands of magnificent‚ delicate parts. My sight is breathtaking‚ I am said to be beautiful. As the days and years go by‚ I look down on the people below‚ their eyes observing
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GROUP 6 ANIMAL CELL and It’s Functions ANIMAL CELL: About animal cell usually have an irregular shape. are eukaryote cells‚ or cells with a membrane bound nucleus. DNA is housed within the nucleus. Also contain other membrane bound organelles‚ or tiny cellular structures that carry out specific functions necessary for normal cellular operation. smaller than plant cells. Cell Membrane is the outermost component of a cell. it is composed of 55% proteins‚ 25% phospholipids
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Commercial Cells Galvanic Cell A Galvanic cell is also known as a Voltaic cell. It was named after Luigi Galvani and Alessandro Volta. A galvanic cell is capable of producing an electric current from a redox reaction that occurs within it and consists of two half cells. Each half cell consists of an electrode and electrolyte and a salt bridge. In a galvanic cell one metal can undergo reduction and the other oxidation. A typical galvanic cell is based on the spontaneous redox reaction: Net Ionic
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Animal Cell Cells are the beginning of everything. Every living thing is composed and made from cells. Cells are the smallest unit of organization that we know of. There are two major categories of cellular organization in eukaryotic cells. Those parts which are “membrane bound”‚ called organelles and those which are not “membrane bound”. Every aspect of the cell is important because each part or organelle’s structure is unique to its function. Non membrane bound organelles‚ are those which provide
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oxidized and thus causes reduction ELECTROCHEMISTRY INVOLVES TWO MAIN TYPES OF PROCESSES: A. Galvanic (voltaic) cells – which are spontaneous chemical reactions (battery) B. Electrolytic cells – which are non-spontaneous and require external e− source (DC power source) C. BOTH of these fit into the category entitled Electrochemical cells GALVANIC CELLS Parts of the voltaic or galvanic cell: o Anode--the electrode where oxidation occurs. After a period of time‚ the anode may appear to become smaller
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Cell City Cell City A cell is like a city. They both have parts that play different roles. A cell is microscopic that has organelles‚ and a city has different services. Keeping them both running smoothly and orderly. As a result they both survive and grow. There’re a lot of different organelles in a cell that are similar to a city for example the cell membrane borders and protects the cell it’s role is letting certain things in and out of the cell in the same way a border in a city does. Another
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address this question: “Propose a possible explanation on why the light caused depolarization of the off-center ganglion cell?” we first have to describe the structure of the center -surround in the receptive fields of retinal. In the receptive field‚ there are cone photoreceptors that communicate with On and Off center bipolar cell and finally On and Off center ganglion cells that carry the action potential to the cortex. When light comes to the retina (eyes) it causes closing of channels in the
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the functional role of amacrine cells in retinal dynamics. In this thought paper I will argue that together with the bipolar and ganglion cells‚ the amacrine cells operate in a parametric system similar to the feedback and feedforward systems found in motor control. In order to determine the role of the amacrine cells they needed to determine the method of bipolar convergence and divergence in ganglion cells. When stimulated individually‚ two different bipolar cells were able to elicit distinct post
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him or her having Sickle Cell Disease. What this is is it’s a disease that is genetically inherited and it involves the red blood cells. Mutations in the HBB gene cause this disease. This disease is inherited in an autosomal recessive pattern‚ which means both copies of the gene in each cell will have mutations. The parents of offspring with an autosomal recessive gene each carry one copy of the mutated gene. The blood cells form an abnormal crescent shape (normal cells are in a disk form). The
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