Ad
related to: pp cells secrete milk and oil molecules
Search results
Results From The WOW.Com Content Network
Once it is produced, pancreatic polypeptide is shown to be a 36 amino acid long peptide that can be sent out to different areas within the pancreas or organism. [6] Pancreatic polypeptide cells are most active and secrete more pancreatic polypeptide after a meal with high protein, fasting, physical activity, and acute hypoglycemia.
Immunohistochemistry for pancreatic polypeptide in a mouse pancreas, 200×. Pancreatic polypeptide (PP) is a polypeptide secreted by PP cells in the endocrine pancreas.It is a hormone and it regulates pancreatic secretion activities, and also impacts liver glycogen storage and gastrointestinal secretion.
The endocrine cells constitute the beta cells which make insulin, alpha cells which secrete glucagon, delta cells which secrete somatostatin and the PP-cells which secrete pancreatic polypeptide. [3] Pancreatic progenitor cells have been shown to arise from cells originating from the developing foregut during mammalian development.
Type I secretion system transports various molecules, from ions, drugs, to proteins of various sizes (20 – 900 kDa). The molecules secreted vary in size from the small Escherichia coli peptide colicin V, (10 kDa) to the Pseudomonas fluorescens cell adhesion protein LapA of 520 kDa. [7] The best characterized are the RTX toxins and the lipases ...
The pituitary gland (or hypophysis) is an endocrine gland about the size of a pea and weighing 0.5 grams (0.018 oz) in humans. It is a protrusion off the bottom of the hypothalamus at the base of the brain, and rests in a small, bony cavity (sella turcica) covered by a dural fold (diaphragma sellae).
Serous glands secrete a watery, often protein-rich, fluid-like product, e.g. sweat glands. Mucous glands secrete a viscous product, rich in carbohydrates (such as glycoproteins), e.g. goblet cells. Sebaceous glands secrete a lipid product. These glands are also known as oil glands, e.g. Fordyce spots and meibomian glands.
Exocytosis and its counterpart, endocytosis, are used by all cells because most chemical substances important to them are large polar molecules that cannot pass through the hydrophobic portion of the cell membrane by passive means. Exocytosis is the process by which a large amount of molecules are released; thus it is a form of bulk transport.
Pepsin / ˈ p ɛ p s ɪ n / is an endopeptidase that breaks down proteins into smaller peptides and amino acids.It is one of the main digestive enzymes in the digestive systems of humans and many other animals, where it helps digest the proteins in food.