Chief cells are responsible for secreting pepsinogen. They have basally located nuclei and a basophilic cytoplasm with abundant rough endoplasmic reticulum and many secretory granules that contain pepsinogen. These are secreted into the lumen of the gastric gland.
What do chief cells and parietal cells secrete?
Chief cells produce pepsinogen, which is converted to pepsin by hydrochloric acid in the stomach. Parietal cells produce hydrochloric acid, allowing this conversion.
What do chief cells secrete quizlet?
Chief cells secrete Gastric Lipase which functions to break down fats into smaller fatty acids that can be further digested in the intestine.
Do chief cells secrete HCL?
The two main types of exocrine secretory cells of the stomach are parietal cells and chief cells. Parietal cells secrete hydrochloric acid and chief cells secrete digestive enzymes such as pepsin.
What is the major product of chief cells?
The gastric chief cell (also known as a zymogenic cell or peptic cell) is a cell in the stomach that releases pepsinogen and chymosin. Pepsinogen is activated into the digestive enzyme pepsin when it comes in contact with hydrochloric acid produced by gastric parietal cells.
What does gastric chief cells secrete?
Pepsinogen is secreted by gastric chief cells, which have been shown to express NK-1 receptors, and is converted to pepsin in the gastric lumen by gastric acid. There is strong evidence that SP is an important stimulant of secretion in the small intestine and colon.
What are chief cells stimulated by?
Chief cells release the zymogen (enzyme precursor) pepsinogen when stimulated by a variety of factors including cholinergic activity from the vagus nerve and acidic condition in the stomach. Gastrin and secretin may also act as secretagogues.
Why do chief cells secrete pepsinogen?
Specific cells within the gastric lining, known as chief cells, release pepsin in an inactive form, or zymogen form, called pepsinogen. By doing so, the stomach prevents the auto-digestion of protective proteins in the lining of the digestive tract.
Do chief cells secrete parathyroid hormone?
Chief cells: The chief cells manage the secretion of parathyroid hormone (PTH). When the cells are viewed, they contain prominent Golgi apparati and a developed endoplasmic reticulum to help with the synthesis and secretion of the hormone.
What are the secretions of the chief cells and parietal cells quizlet?
– The secretions of the mucous, parietal, and chief cells form gastric juice, which totals 2-3 l/d. and mucous neck cells. – The strongly acidic nature of gastric juice kills many microbes, partially denatures proteins in food, and converts pepsinogen into pepsin.
What do cardiac and pyloric glands secrete?
Both the cardiac and pyloric glands secrete mucus, which coats the stomach and protects it from self-digestion by helping to dilute acids and enzymes.
Where is food turned into chyme?
chyme, a thick semifluid mass of partially digested food and digestive secretions that is formed in the stomach and intestine during digestion.
Do chief cells secrete bicarbonate?
Gastric chief cells produce pepsinogen, which is activated by the acid to form pepsin. Pepsin is a protease that can digest and damage stomach cells. To prevent these disastrous effects, mucus and bicarbonate ions (HCO3−) are secreted by the foveolar cells.
What cells secrete gastric lipase?
Gastric lipase is an acidic lipase secreted by the gastric chief cells in the fundic mucosa in the stomach.
Do chief cells secrete intrinsic factor?
Intrinsic factor is a glycoprotein secreted by parietal (humans) or chief (rodents) cells of the gastric mucosa.
What are the secretory products of chief cells?
Chief cells: secrete pepsin, a proteolytic enzyme. G cells: secrete the hormone gastrin.
Do chief cells secrete hormones?
Chief cells are programmed to synthesize and secrete PTH unless inhibited by extracellular calcium, but secretion is not totally suppressed even when plasma concentrations of calcium are very high.
What do Oxyphil cells secrete?
The parathyroid chief and oxyphil cells produce parathyroid hormone (PTH), express the calcium-sensing receptor (CASR), and mobilize intracellular calcium in response to CASR activation.
