also surrounds the organelle‚ and controls the entry and exit of materials. The inner membrane of the cell is folded to form Cristae. Cristae provide a large surface area for the attachment of the enzymes involved in respiration. The rough endoplasmic reticulum manufactures membranes and secretory proteins. In leukocytes the rough ER produces antibodies. In pancreatic cells the rough ER produces insulin. The rough and smooth ER are usually interconnected and the proteins and membranes made by the
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Give reasons (s) 1- Formaline is used as fixative in preparation for LM examinations 2- Resolution power is difference from magnification power Complete 1- The cells are the smallest …… and …… units in the body. 2- The size of tissue sample for histological preparation is …… in light microscope and ……. in electron microscope. 3- Fixative used in tissue preparation for LM examination is …….. while in EM is …….. 4- Substance used for tissue embedding in preparation for LM examination is
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biO315 Final Draft SNARE Complexes and their Important Role with Vesicle Fusion and Docking SNARE complex’s play a role in all vesicle fusion within the cell including going from the endoplasmic reticulum to the golgi body and golgi body to lysosomes or to mitigate exocytosis of intracellular vesicles with the cellular membrane. The SNARE complex is made up of 2 classes of protiens that allow vesicle fusion called the v-snares and t-snares. The v-snares are found on the vesicle and include synaptobrevin
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Session 1 We use the scientific method every day. Imagine your car doesn’t start one morning before school. Which of these is a reasonable hypothesis regarding the problem? I’m out of gas. A scientific theory explains what we know to this date about a natural event. Which of the following is a theory? There is molecular and biochemical evidence that all organisms are related. Choose the answer that best describes the sequence of the scientific method. observation‚ hypothesis‚ experiment‚ conclusion
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lower energy Term Which of the following is an example of an endogenous fat from an exogenous source? Definition triglycerides Term Which of the following organelles is specialized for lipid and steroid synthesis? Definition smooth endoplasmic reticulum Term What organelle packages proteins into secretory vesicles? Definition Golgi apparatus Term Molecules with a relatively high lipid solubility are capable of crossing the membrane ________. Definition directly across the lipid bilayer
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Produced by cell clusters in the pancreas called the Islets of Langerhans‚ insulin is a hormone that regulates glucose concentration in the blood. It is a protein synthesised and stored by beta cells‚ which secrete it in surges responding to changes in glucose levels. (Hardin‚ Bertoni and Kleinsmith‚ 2012) Fig 1. The Pancreas and Insulin |Source: University of Maryland (2011) | | |
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cells? Endoplasmic reticulum Golgi apparatus Mitochondria Myofilaments 1-4 Which of the following is the primary purpose of mitochondria? Maintenance of cell shape Modification of proteins Production of energy Replication of cellular structures 1 1-5 Protein X is needed to help maintain two other proteins‚ both of which only exist in the cytoplasm of the cell. Where is protein X most likely synthesized? Free ribosome Nucleus Rough endoplasmic reticulum Smooth endoplasmic reticulum
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body. Each component has its own specific role that it performs in order for the cell to function and maintains the cell membrane. The main components of the cell include the cell membrane‚ cytoplasm‚ the nucleus‚ nucleolus‚ nuclear membrane‚ endoplasmic reticulum (smooth ER and rough ER)‚ mitochondria‚ Golgi apparatus‚ lysosomes‚ ribosomes and vacuoles. a) The cell membrane – The cell membrane otherwise known as the plasma membrane is located on the surface of a typical animal cell. The cell membrane
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helps in movement. The intermediate filaments are strands of globular proteins like the others. Membrane bound organelles are the ‘guts’ of a eukaryotic cell. Membrane bound organelles consist of the nucleus‚ cytoplasm‚ the lysosmes‚ and the endoplasmic reticulum. The nucleus is a highly specialized organelle that serves as the information’s and administrative center of the center of the cell. It also has two major functions its stores hereditary material and coordinates the cells activities. The cytoplasm
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except bacterial cells its job is to control all cell functions‚ it’s the head of the cell also like city hall or the mayor. In addition the Golgi Bodies or Golgi Apparatus modifies‚ stores‚ and directs the movement of molecules made by ER (Endoplasmic Reticulum) in the same way the mail delivery does in a city. Lastly‚ is the mitochondrion which transforms the unusable energy in food molecules into a form of usable energy likewise a power plant or PG&E do in a city. As you see a cell and a city
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