Hepatic stellate cell

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    Stellate Cells (SC) are morphologically characterized by dendrites that radiate from the main cell body leading to a star-like shape and giving rise to the name Stellate i.e. star-like. They can be found in various parts of the body such as: kidneys, lungs, liver, breast, and pancreas; some of these ones have been less thoroughly characterized compared to others such as hepatic SC [1-5]. Although the dissimilar microenvironment of SC in different parts of the body condition them to react different, it have been shown that they have morphological and biochemical similarities. In their quiescent state, they store and transports vitamin A compounds (retinoid) in the form of droplets in their cytoplast. During an injury they undergo structural…

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    Introduction Upper gastrointestinal bleeding can be manifested with hematemesis, melena or hematochezia. Acute bleeding due to gastroesophageal varices in cirrhotic patients is associated with higher morbidity, mortality rates as well as development of life-threatening complications. This bleeding significantly increase protein concentration in the bowel which results in increased ammonia production by colonic bacteria and precipitation of development of hepatic encephalopathy [1].…

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    The Effect of Insulin and Glucagon Before and After Meals Lucy Foley Course number and section Experiment Date Lab Partners Introduction Blood glucose is the preferred energy source for our bodies. Blood glucose is the preferred fuel source for ATP production and neurons absolutely have to have glucose. Other cells can use alternative nutrients, such as fatty acids, glycerol, and amino acids. Without glucose, neurons cannot function meaning humans could seizure and/or die. There are two…

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    The portal triad is typically approached from the right. A wide Kocher maneuver is performed to mobilize the duodenum and head of the pancreas. The ascending colon and hepatic flexure are mobilized with right medial visceral rotation. The duodenum and right colon are reflected to the left to expose the retro-pancreatic or supra-pancreatic portal vein. Occasionally, we enter the lesser sac and divide the neck of pancreas if exposure of more distal portal vein is required. Control of…

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    Nucleus Essay

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    found inside a eukaryotic cell; it’s usually the most prominent organelle, yet it occupies only 10% of the total volume of the cell. If this cell did not have a Nucleus, it would be defined as a prokaryote cell, however if the Nucleus was damaged and not repaired, the cell would simply die. The cell nucleus is enclosed within a double membrane (contains an Inner and Outer Nuclear Membrane) called the Nuclear Envelope, which separates the Chromosomes from the Cytoplasm and allows material to…

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    Organelles Essay

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    Cells have specific structures within them that allow them to carry out their functions; these structures are called organelles. Organelles have different functions within a cell that is called Division of Labor. They are also classified in two different groups, membranous and non-membranous. Membranous organelles are surrounded by a membrane while of course, non-membranous are not surrounded by a membrane. When describing the organelles and their function, first will be the membranous…

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    The Importance Of Biology

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    The beauty about life is that each and every multicellular living being on this planet was created by a sperm cell fertilizing an egg cell to form a zygote. Once the zygote is formed a processes knows as mitosis allows the zygote to develop cells, tissue, and organ systems until all of the proper systems necessary for survival are formed (Witz BW 2004). Conceiving a baby is one of the most beautiful things life could bring someone, and biology is to thank for that. Without the study of biology,…

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    Another form of a water starved environment is environments with high salinity, such as the environments where you would find Haloarcula marismortui, an extreme halophilic archaea from the Dead Sea. Har. marismortui is one of many halophilic archaea that are found to grow optimally in concentrations of NaCl that meet or exceed 2.5M concentration (Madern, et al. 1999), and it must maintain osmotic homeostasis with the environment if it is to preserve enough water to live. In order to survive,…

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    Researchers only had 40% of Lucy’s skeleton so they used comparison and inferring as a technique to reconstruct Lucy. While putting together Lucy’s skeleton, researchers found out that she was very small and an adult. They decided to use a modern human skeleton to infer some of the missing pieces. The team filled in some of the missing parts using other fossils and making a physical model of the skeleton which they would use as a basis of the reconstruction (Prehistoric Autopsy video). Professor…

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    Dna Synthesis

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    step of DNA replication is termination. In this step, two new DNA strands have been produced from the previous elongation step. However, the strands produced are not in long and continuous form but instead are in non-continuous short strands. This is where the function of an enzyme called DNA ligase takes place. The nick or spaces between the new DNA strands are joined using the enzyme DNA ligase resulting in the formation of two long daughter strands of DNA (Campbell et al., 2015). After the…

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