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Gastric chief cells (as opposed to the chief cells present in the parathyroid gland) are the zymogen cells in the stomach that release pepsinogen (a precursor (zymogen) of pepsin). Without stimulation chief cells normally secrete pepsinogen at about 20% of the maximum ability.
ACh (released by nerves) is the most important pathway for gastric chief cell activation.
ACh also stimulates parietal cells, which secrete HCl (stomach acid). The fall in pH causes a reflex which further stimulates chief cells.
Alternatively, acid in the duodenum (the first portion of the small intestine), stimulates release of secretin from S cells of the small and large intestine. Secretin also activates gastric chief cells.
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What other cells work with the parietal cell?
Chief cells in the stomach work with parietal cells to produce gastric acid. Chief cells secrete pepsinogen, which is activated by the acid produced by parietal cells to form pepsin, an enzyme that helps break down proteins. Together, parietal and chief cells contribute to the digestive process in the stomach.
Are pepsinogens produced by parietal cells in the stomach?
No, pepsinogens are not produced by parietal cells; they are produced by chief cells in the stomach. Parietal cells are responsible for secreting hydrochloric acid and intrinsic factor. Pepsinogens are inactive precursors of pepsin, an enzyme that aids in protein digestion, and they are activated into pepsin in the acidic environment created by the hydrochloric acid from parietal cells.
Gastrin secretes what?
pepsinogen (a precursor of pepsin) which helps humans digest, when activated by HCL.
What is the shape of the chief cells of cuboidal epithilium?
The shape of the chief cells of cuboidal epithilium is domed-shaped.
What is the function of the chief cells of the parathyroid?
Gastric chief cells are in the digestive system. They release pepsinogen which is a digestive enzyme that when activated by hydrochloric acid turns into pepsin and helps in the digestion of proteins. Chief cells may also refer to parathyroid chief cells which produce and secrete parathyroid hormone when stimulated by low levels of calcium.
What is the difference between parietal cells and chief cells?
Parietal cells are stomach cells that produce hydrochloric acid and intrinsic factor, while chief cells secrete pepsinogen, which is later activated into pepsin to help with protein digestion. Parietal cells are involved in acid production, while chief cells assist in protein digestion.
What do chief cells do?
Chief cells secret pepsinogen and gastric lipase. Pepsin, the activated form of pepsinogen, can break down proteins into peptides and gastric lipase can break down trigylcerides into fatty acids and monoglycerides.
What do chief cells in the stomach secret?
The chief cells secret pepsinogen and gastric lipase. The activated form of pepsinogen (i.e. pepsin) can break down proteins into peptides. As for the lipase, it can split trigylcerides into fatty acids and monoglycerides.
What do chief cells secrets?
Chief cells secret pepsinogen and gastric lipase. Pepsin, the activated form of pepsinogen, can break down proteins into peptides and gastric lipase can break down trigylcerides into fatty acids and monoglycerides.
What other cells work with the parietal cell?
Chief cells in the stomach work with parietal cells to produce gastric acid. Chief cells secrete pepsinogen, which is activated by the acid produced by parietal cells to form pepsin, an enzyme that helps break down proteins. Together, parietal and chief cells contribute to the digestive process in the stomach.
Which cells secrete Pepsin?
Chief cells in the stomach secrete pepsinogen, which is then activated to pepsin by hydrochloric acid present in the gastric juice. Pepsin is an enzyme that breaks down proteins into smaller peptides during the process of digestion.
What cells produce pepsinogen and hcl?
Chief cells of the stomach (gastric glands in stomach have chief cells)
T cells and B cells activated only by what?
T cells are activated by antigens presented on the surface of antigen-presenting cells, such as dendritic cells. B cells are activated primarily by recognizing antigens with their B cell receptor, although they may also require T cell help for full activation.
When B-cells are activated they divide to form antibody-producing cells called?
Plasma cells.
What is the shape of the chief cells of skeletal muscles?
The shape of the chief cells of the skeletal muscles is that they are tube-shaped.
What in the ear is activated by the movement of the perilymph?
Hair cells
What happens immediately AFTER a lymphocyte becomes activated?
Immediately after a lymphocyte becomes activated, it undergoes clonal expansion, rapidly proliferating to produce numerous identical daughter cells. These daughter cells differentiate into effector cells, such as cytotoxic T cells or plasma cells, depending on the type of lymphocyte activated. This process enhances the immune response, enabling the body to effectively target and eliminate pathogens or infected cells. Additionally, some of these activated lymphocytes will become memory cells, providing long-term immunity.
