New answers tagged cell-biology
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Senescent red blood cells are cleared by macrophages in a process called eryptosis or is better known as erythrocyte programmed cell death or apoptosis. The mechanism is excellently reviewed here. In summary it is mediated by caspases, phospholipase A and prostaglandin E.
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Autologous stem cell transplants are used to treat individuals who have had their bone marrow destroyed or damaged by diseases such as lymphomas or by irradiation or cancer treatments. As they are damaged and potentially cancerous, they are removed. They are then replaced in the transplant. The whole idea is to destroy all the cells before transplanting the ...
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Yes. All proteins actually begin to get synthesized on cytoplasmic ribosomes but if they are going to be used for extracellular purposes, they are tagged and whole ribosome is taken to ER where protein synthesis is completed. The proteins are exocytosed with help of Golgi body, the post office tagging and packaging organelle (the Golgi body packages these ...
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The definition of life is a controversy in itself, and as it is simply a word that can be understood by everyone however they wish, there is no "correct" definition. It is thus not really possible to give a "correct" answer to your question, but here are a list of things you may want to consider:
Replication of DNA is probably the most agreed common ...
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The process of formation of different types of cells that differ in morphology and function is termed as cell differentiation. In multi-celled organism, each task of life is carried out by different types of specialized cells say nerve cell for transmitting impulses, muscle cells for coordinating movement and these cells differ in their appearance and ...
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Bilayer components will 'flip-flop' at measurable rates, but these are very different for different lipid classes. Here are the results of an experiment using fluorescently-labelled analogues.
Bai, JN and Pagano, RE (1997) Measurement of spontaneous transfer and transbilayer movement of BODIPY-labeled lipids in lipid vesicles. Biochemistry 36:8840-8848 ...
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I thought it was just that the other aneuploidies were fatal. They occur as often but miscarry earlier in the term therefore you don't see them. So basically there are only three that are viable 21,18 and the sex chromosome with a number of combinations: XO, XXY, XYY and XXX.
More information here:
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Pheomelanine,has it normal function in transforming radiant heat to energy but can't protect its host from ultra violent wave from the sun as ultra violent waves will distroy melanin cells.
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Cytokines is the general class of molecules to which chemokines, interferons, interleukins and others belong. Biologists dispute whether something is a hormone or a cytokine, but generally the consensus goes with if it's to do with immunology it's a cytokine or if the resting concentration is in the picomolar range, but that's a very rough distinction.
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Languages evolve on their own when they need to, you should embrace it rather than worrying about some language stickler telling you made a typo.
I think everyone would know what you mean by "meios" and "mitos", and it might catch on. I'm not advocating slang, but given the opaque jargon I see scientists making up every day, I'd advocate streamlining the ...
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Mitosis as a process does not have a verb form. However, as a process, there is an adjective; you could describe cells that undergo mitosis as mitotic.
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Cellular and Molecular Immunology by Abul Abbas et al. is pretty good, and you can't beat Charlie Janeway's Immunobiology either. Both will give a good introduction to B-cells, antibodies, BCR signaling, and how they fit in to the immune system's structure and function. I own earlier editions of both, and their different perspectives are good for getting a ...
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