Chief cells are responsible for secreting pepsinogen. goblet cells: their purpose is to secrete mucusthis mucus serves to protect the digestive tube from digestive enzymes and to allow the smooth passage of material along the tube. Pepsin: breaks down proteins (pepsin is activated by the exposure to hydrochorlic acid-HCl in the stomach) -parietal cells (epithelial cells in the stomach) secret HCl. Digestive System: Function, Organs & Anatomy - Cleveland Clinic Absorption: The animal’s cells take up (absorb) small molecules such as amino acids and simple sugars 4. ... 3- Chief cells: Sec. Pepsinogen is activated into the digestive enzyme pepsin when it comes in contact with acid produced by gastric parietal cells. This type of reaction is a form of positive feedback since the end product of a process encourages the formation of more end products. cell Immune System Components: • specific cells - lymphocytes, macrophages, etc., originate from precursor cells in the bone marrow and patrol tissues by circulating in either the blood or lymphatics, migrating into connective tissue or collecting in immune organs • lymphatic organs- thymus, spleen, tonsils, lymph nodes • diffuse lymphatic tissue-collections of lymphocytes and … The digestive system has three main functions relating to food: digestion of food, absorption of nutrients from food, and elimination of solid food waste. IMMUNE SYSTEM HANDOUT Descriptors are arranged in a hierarchical structure, which enables searching at various levels of specificity. The enteric nervous system provides intrinsic innervation, and the autonomic nervous system provides extrinsic innervation. Patient concerns: An 84-year-old Chinese man was referred to our hospital for endoscopic resection of a gastric lesion. The breakdown of the nutrients requires the coordination of several enzymes secreted from specialized cells within the mouth, stomach, intestines, and liver. Regions 8 | Digital Histology This is a complex process. b) Parietal cells – produce HCl-c) Chief cells – … View by Investigator Name; View by Scientific Focus Area ; Accomplishments. Other organs assist with digestion by mechanically breaking down food or secreting … In mammals, chief cells are located at the base of glands distributed throughout the fundus and corpus of... Endocrine System. Chief cells in the stomach secrete pepsinogen, which is then cleaved into the active pepsin. Chief cells > Chief cells secrete the enzyme precursor pepsinogen and, therefore, as protein-secreting exocrine cells, have basally located rough endoplasmic reticulum and apically located secretory granules.

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