What are 4 specialized secretory cells in the gastric pits of the stomach?
Four major types of secretory epithelial cells cover the surface of the stomach and extend down into gastric pits and glands: Mucous cells: secrete an alkaline mucus that protects the epithelium against shear stress and acid. Parietal cells: secrete hydrochloric acid. Chief cells: secrete pepsin, a proteolytic enzyme.
What cells are found in gastric pits of the stomach?
Gastric Pits
- Goblet cells – secrete mucus to form a protective layer around the stomach lining.
- Parietal cells – secrete hydrochloric acid which is responsible for creating a low pH environment in the stomach.
- G cells – secrete gastrin (stimulates release of stomach acids to increase stomach acidity)
What are the 5 cells that make up the gastric pits and what are their functions quizlet?
Terms in this set (5)
- chief cells. pepsinogen, and gastric lipase.
- parietal cells. secrete hcl, this inhibits vit b12 absorption in the small intestine.
- surface mucous cells. protects endothelium.
- g cells. secrete gastrin.
- enterochromaffin cells. activate parietal cells.
What does gastric pits secrete?
Gastric acid also known as gastric juice is secreted from gastric glands, which are located in narrow tube like structures called gastric pits. Gastric juice contains hydrochloric acid, pepsinogen and mucus in a healthy adult.
What are gastric pits?
Gastric pits are indentations in the stomach which denote entrances to the tubular shaped gastric glands. They are deeper in the pylorus than they are in the other parts of the stomach. The human stomach has several million of these pits which dot the surface of the lining epithelium.
What are gastric chief cells?
The gastric chief cells are epithelial cells in the gastric glands in the stomach lining. They are responsible for the secretion of pepsinogen and gastric lipase. In humans, the gastric chief cells are stimulated by the acidic condition of the stomach as well as through the cholinergic activity from the vagus nerve.
What are the secretory cells?
Secretory cells are tall columnar cells containing secretory granules in their cytoplasm. The marks of proteosynthetic activity are represented by numerous, well-developed profiles of the Golgi apparatus and granular endoplasmic reticulum.
What is produced by the gastric pits?
In the stomach, digestive juices are formed by the gastric glands; these secretions include the enzyme pepsin, which breaks down proteins, and hydrochloric acid.
Which of the following cells of gastric pit and glands secrete gastrin quizlet?
– Enteroendocrine G cells, located mainly in the pyloric antrum, secrete the hormone gastrin into the bloodstream. – The secretions of the mucous, parietal, and chief cells form gastric juice, which totals 2-3 l/d.
What are the three major types of cells found in the gastric glands name their secretions?
The three major types of cells found in the gastric glands with their secretions are as follows: i. Mucous Neck cells – they secrete mucus ii. Peptic or chief cells – they secrete Proenzyme Pepsinogen and Prorennin iii. Parietal or oxyntic cells – they secrete HCl and intrinsic factor.