| D008540 |
Meiosis |
A type of CELL NUCLEUS division, occurring during maturation of the GERM CELLS. Two successive cell nucleus divisions following a single chromosome duplication (S PHASE) result in daughter cells with half the number of CHROMOSOMES as the parent cells. |
M Phase, Meiotic,Meiotic M Phase,M Phases, Meiotic,Meioses,Meiotic M Phases,Phase, Meiotic M,Phases, Meiotic M |
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| D009865 |
Oocytes |
Female germ cells derived from OOGONIA and termed OOCYTES when they enter MEIOSIS. The primary oocytes begin meiosis but are arrested at the diplotene state until OVULATION at PUBERTY to give rise to haploid secondary oocytes or ova (OVUM). |
Ovocytes,Oocyte,Ovocyte |
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| D009866 |
Oogenesis |
The process of germ cell development in the female from the primordial germ cells through OOGONIA to the mature haploid ova (OVUM). |
Oogeneses |
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| D006801 |
Humans |
Members of the species Homo sapiens. |
Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man |
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| D000818 |
Animals |
Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. |
Animal,Metazoa,Animalia |
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| D015398 |
Signal Transduction |
The intracellular transfer of information (biological activation/inhibition) through a signal pathway. In each signal transduction system, an activation/inhibition signal from a biologically active molecule (hormone, neurotransmitter) is mediated via the coupling of a receptor/enzyme to a second messenger system or to an ion channel. Signal transduction plays an important role in activating cellular functions, cell differentiation, and cell proliferation. Examples of signal transduction systems are the GAMMA-AMINOBUTYRIC ACID-postsynaptic receptor-calcium ion channel system, the receptor-mediated T-cell activation pathway, and the receptor-mediated activation of phospholipases. Those coupled to membrane depolarization or intracellular release of calcium include the receptor-mediated activation of cytotoxic functions in granulocytes and the synaptic potentiation of protein kinase activation. Some signal transduction pathways may be part of larger signal transduction pathways; for example, protein kinase activation is part of the platelet activation signal pathway. |
Cell Signaling,Receptor-Mediated Signal Transduction,Signal Pathways,Receptor Mediated Signal Transduction,Signal Transduction Pathways,Signal Transduction Systems,Pathway, Signal,Pathway, Signal Transduction,Pathways, Signal,Pathways, Signal Transduction,Receptor-Mediated Signal Transductions,Signal Pathway,Signal Transduction Pathway,Signal Transduction System,Signal Transduction, Receptor-Mediated,Signal Transductions,Signal Transductions, Receptor-Mediated,System, Signal Transduction,Systems, Signal Transduction,Transduction, Signal,Transductions, Signal |
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| D017173 |
Caenorhabditis elegans |
A species of nematode that is widely used in biological, biochemical, and genetic studies. |
Caenorhabditis elegan,elegan, Caenorhabditis |
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| D047108 |
Embryonic Development |
Morphological and physiological development of EMBRYOS. |
Embryo Development,Embryogenesis,Postimplantation Embryo Development,Preimplantation Embryo Development,Embryonic Programming,Post-implantation Embryo Development,Postnidation Embryo Development,Postnidation Embryo Development, Animal,Pre-implantation Embryo Development,Prenidation Embryo Development, Animal,Development, Embryo,Development, Embryonic,Development, Postnidation Embryo,Embryo Development, Post-implantation,Embryo Development, Postimplantation,Embryo Development, Postnidation,Embryo Development, Pre-implantation,Embryo Development, Preimplantation,Embryonic Developments,Embryonic Programmings,Post implantation Embryo Development,Pre implantation Embryo Development |
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