what are the events occurring during phagocytosis?
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phagocytosis occurs mostly in phagoctyes. the pathogen which has been coagulate by the antibodies produced by lymphocytes. the phagocytes then engulfs the bacteria(phagocytosis) and enzymes from the lysosome digests the contents.
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the list of activities is endless:\n\nDNA replication, mitosis, protein synthesis, lipid synthesis, protein and lipid metabolism, oxidative phosphorylation, cholesterol synthesis, and on and on and on the list goes . . . . of course it all depends on the type of cell.
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DNA\nRNA\ncarbohydrate (eg glycogen)\npolypeptides (proteins)\nmucopolysaccharides (proteins joined to carbohydrates)\nlipopolysaccharides (proteins joined to lipids)\nother lipids eg in membranes, and storage fat\n\nThere may be others.
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http://en.wikipedia.org/wiki/Oxidative_phosphorylation\n \nthis site should be useful for that
80863
cellular and molecular biology
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None-- But the endoplasmic reticulum does come in contact at various times during the life cycle
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The correct answer is C.\n\nIn A. Only T-cells take part in cell mediated immunity. The others are not cell-mediated. For example, B-cells take part in humoral immunity. Natural killer cells are non-specific (innate immunity) and are therefore not part of cell-mediated immunity (which is acquired immunity).\n\nIn B. Infected cells do get killed off in the process. Infected cells will display the antigen fragments via their major histocompatibility  (MHC) I proteins on the surface of the cells. These antigens will allow cytotoxic T-cells to bind to them with their CD-8 receptors. The cytotoxic T-cells will release perforins that cause pores to form on the cell membrane. Granzyme is also released to cause proteins in the cell to break down.\n\nIn C. Antibodies are part of the humoral response (humoral immunity). Opsonization only occurs for antigens outside the cell, in the bloodstream or lymph fluid. They are not part of cell-mediated immunity.\n\nD is definitely wrong.
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Check them out here:\nhttp://www.cellsalive.com/cells/3dcell.htm \n\ncorrectly spelled: Prokaryotic and Eukaryotic
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b) cold : hot\n\nEndocytosis the soluble molecules are taken up from outside the cell through the formation of vesicles.  The membrane folds around material outside the cell, resulting in the formation of a saclike vesicle into which the material is incorporated. This vesicle is then pinched off from the cell surface so that it lies within the cell.\nExocytosis is exactly the OPPOSITE in which The cellular secretion of macromolecules by the fusion of vesicles with the plasma membrane.\nThey are antonyms.\n\nIn a)phagocytosis is something that a white blood cell does to a bacteria (i.e. engulf it to destroy it...so that's not opposite.\nIn b) hot and cold are OPPOSITE meanings and are antonyms.\nIn c) a white blood cell will phagocytos a bacteria but once again, that they aren't opposite in meaning.\nIn d) phagocytosis and engulfing are the same definition, i.e. synonyms and thus are not the answer.
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Phagocyte.... is that what you meant?
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Types\nThe two types of phagocytes, polymorphonuclear leukocytes and macrophages, each have an important role in the immune system. While polymorphonuclear leukocytes typically respond swiftly and efficiently to invading pathogens; they are mainly adapted for short term response. Macrophages, on the other hand, are initially slow to react, but are capable of engulfing and digesting almost any foreign agent, and last for a longer period of time.\n\n[edit]\nPolymorphonuclear leukocytes\nThe polymorphonuclear leukocytes, also known as granulocytes, include neutrophils, eosinophils and basophils. Neutrophils are the most abundant kind of phagocytes. They reduce bacterial cells to their constituent amino acids by ingesting, killing, and digesting them. Eosinophils secrete special enzymes intended to create holes in parasitic worms. Finally, basophils secrete substances such as histamine, in order to extend the period of inflammation.\n\n[edit]\nMacrophages\nMacrophages adapted specially for sustained battles against foreign agents. In addition, they help to clean up and remove damaged tissues. Immature macrophages which are circulating in the bloodstream are called monocytes. These macrophages cannot react immediately, but once they have developed, they are often referred to as 'killing machines' they act by phagocytizing and destroying anything that isn't recognized as belonging to the body
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lysogenic (copies itself in genome of other cells, cell divide...later it enters lytic cell and burst to spread virus\n\nAnswer: Lysogenic cycle
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nucleus, cytoplasm and protoplasm ....
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Too many to list and explain here, without copying and pasting  --and why should I do all your uni work for you? ;-)\n\nI will recommend a couple of good text books through.  Well worth a purchase or just get them on loan from your library...\n\nAlberts et al, Molecular Biology of the Cell\nStryer, Biochemistry\n\nIt's been since I bought mine.  Think I got editions 2 & 7 back in 1996 and I know both have been updated a couple of times since.  These are still a GREAT basic resourse for this sort of question.
199023
k, let's see if i remember...\n\nfirst you get cut, next proteins and cytokines are released by the local cells to recruit platelets (for clotting), neutrophils, and macrophages.  The neutrophils and macrophages are there to clean up all the dead cells that die in the attack and also to take any bad stuff to the nearest lymph node.  They antibodies can be made against the foreign body.  Therefore, if any of the lil buggers got away from the site of the cut, the antibodies will hopefully soon find them and kill 'em dead. ;)  those are the simplest words I could use to explain it.
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Phagocytosis - enclose solids.\nPinocytosis - enclose liquids.
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It would depend on several factors. Small, uncharged molecules can pass through the cell membrane through diffusion. When it is water, it is called osmosis. Diffusion can only occur into the cell when the concentration of the substance is greater outside the cell than within it, and likewise only out of the cell when the concetration is greater inside the cell than outside. This is called the concentration gradient.\n\nWhen the molecule is charged or is large (such as a chlorine ion or a lactose molecule), it requires active transport by carrier proteins. There are also carrier proteins that help to transport against the concentration gradient.\n\n[Edit] \nAfter thinking for a bit, I believe it would be pertinent to include something about the more complex methods of active transport.\n\nThere are two "directions" of the complex forms of active transport: in (endocytosis) and out (exocytosis).\n\nExocytosis is when a vesicle, after being released from the Golgi complex, fuses to the cell membrane, releasing the contents.\n\nEndocytosis is done by three main means: Phagocytosis, Pinocytosis, and Receptor-Mediated Endocytosis.\n\nPhagocytosis is the process of enveloping a large particle, such as how many unicellular organisms "eat" other organisms. The large particle comes in contact with the cell membrane, stimulating the formation of a vesicle. This vesicle then enters the cell and depending on the contents may fuse with a lysosome to help to digest it.\n\nPinocytosis also forms a vesicle, but differs from phagocytosis because it forms a much smaller vesicle.\n\nReceptor-mediated endocytosis is when particles that cannot normally enter the cell bond to receptor proteins embedded in the cell membrane. These proteins then congregate and form a vesicle. \n\nIn all forms of endocytosis and exocytosis, ATP is required for energy.