Ch.10-Digestion, Q4

Secretin

Stimulates secretion of pancreatic juice rich in bicarbonate ions and inhibits secretion of gastric juice

Saliva

Contains different ions, dissolved gas’s, IgA antibodies, defensins, lysozyme, and digestive enzyme

Pylorus

Connects the stomach with the duodenum

Liver

Makes bile

Lipases

Triglyceride-digesting enzyme in adults

Intrinsic factor

Needed for absorption of vitamin B12

Ileocecal Sphincter

Connects small and large intestine

Hydrochloric acid

Kills microbes in food; denatures proteins; converts pepsinogen into pepsin

Gastrin

Promotes secretion of gastric juice, increases gastric motility, constricts lower esophageal sphincter, and relaxes pyloric sphincter

Gastric Juice

Contains HCl, mucus, intrinsic factor, and digestive enzymes

Gallbladder

Concentrates and releases solution necessary for the emulsification and absorption of lipids

Cholecystokinin

Stimulates secretions of pancreatic juice rich in digestive enzymes and causes ejection of bile from the gall bladder

Amylases

Responsible for most of carbohydrate enzymatic digestion

Segmentation

Rhythmic local constriction of the small intestine that helps mix food with digestive juices and makes absorption more efficient

Peristalsis

Alternating waves of contraction and relaxation that contributes with propulsion of food

Parietal cells

Simultaneously secrete hydrochloric acid and intrinsic factor

Enteroendocrine cells

Secrete Gastrin that diffuse into the blood capillaries

Chief cells

Secrete pepsinogen

Bilirubin

Break down product of heme catabolism. Normally excreted in bile and urine

Pepsin

Responsible for protein digestion in the stomach