Physiology
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Neuromedin S
Neuromedin S聽is a 36-amino acid聽neuropeptide聽found in the brain of humans and other mammals. It is produced in the聽suprachiasmatic nucleus聽of the聽hypothalamus聽and is related to聽neuromedin U. It is thought to be involved… Read more.
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Neuromedin N
Neuromedin N聽is a聽neuropeptide聽derived from the same precursor polypeptide as聽neurotensin, and with similar but subtly distinct expression and effects. References Peptides:聽neuropeptides Categories: Read more.
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Neuromedin B
Neuromedin B聽(NMB) is a聽bombesin-related聽peptide聽in mammals. It was originally purified from pig spinal cord, and later shown to be present in human聽central nervous system聽and聽gastrointestinal tract. Sequence The sequence of the C-terminal… Read more.
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Bombesin (and a wee bit of ranatensin)
Bombesin聽is a 14-amino acid聽peptide聽originally isolated from the聽skin聽of the聽European fire-bellied toad聽(Bombina bombina)聽by聽Vittorio Erspamer聽et al.聽and named after its source. It has two known聽homologs聽in聽mammals聽called聽neuromedin B聽and聽gastrin-releasing peptide. It stimulates聽gastrin聽release from聽G cells. It activates three… Read more.
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The lactating birds and the bees (gastrin, pepsin, etc)
Crop milk聽is a secretion from the lining of the聽crop聽of parent birds that is聽regurgitated聽to young birds. It is found among all聽pigeons and doves聽where it is referred to as聽pigeon milk. An analog… Read more.
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Columbidae anatomy and physiology notes
Overall, the聽anatomy聽of Columbidae is characterized by short legs, short bills with a fleshy聽cere, and small heads on large, compact bodies.聽Like some other birds, the Columbidae have no聽gall bladders.聽Some medieval naturalists… Read more.
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Delta cells (未-cells聽or聽D cells) are聽somatostatin-producing聽cells
Delta cells (未-cells or D cells) can be found in the stomach, intestine and the pancreatic islets. Delta cells comprise ca 5% of the cells in the islets but may interact with many more islet cells than suggested… Read more.
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HCO3 (bicarbonate)
In聽inorganic chemistry,聽bicarbonate聽(IUPAC-recommended nomenclature:聽hydrogencarbonate) is an intermediate form in the聽deprotonation聽of聽carbonic acid. It is a聽polyatomic聽anion聽with the chemical formula聽HCO3. Bicarbonate serves a crucial biochemical role in the physiological聽pH聽buffering聽system. The term “bicarbonate” was聽coined聽in 1814… Read more.
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Intrinsic factor聽(IF) and haptocorrin (transcobalamin I) are necessary for the absorption of聽vitamin B12
Intrinsic factor聽(IF),聽cobalamin binding intrinsic factor,聽also known as聽gastric intrinsic factor聽(GIF), is a聽glycoprotein聽produced by the聽parietal cells聽(in humans) or chief cells (in rodents) of the聽stomach. It is necessary for the absorption of聽vitamin B12聽later… Read more.
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Pepsinogens are mainly grouped in 5 different groups based on their primary structure
1. Pepsinogen A (also called pepsinogen I) 2. Pepsinogen B 3. Progastricsin (also called pepsinogen II and pepsinogen C) 4. Prochymosin (also called prorennin) 5. Pepsinogen F (also called pregnancy-associated… Read more.
