chapter 7/22

What does Secretin do?

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

What is Saliva primarily composed of?

Contains different ions, dissolved gases, IgA antibodies, defensins, lysozyme, and digestive enzymes.

What is the function of the pylorus?

Connects the stomach with the duodenum.

What is Pepsin responsible for?

Responsible for protein digestion in the stomach.

What is the role of the Liver?

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

What is the function of Lipases?

Triglyceride-digesting enzyme in adults.

What is Intrinsic factor necessary for?

Needed for absorption of vitamin B12.

What is the function of Bilirubin?

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

What do Parietal cells secrete?

Simultaneously secrete hydrochloric acid and intrinsic factor.

What is the Ileocecal Sphincter's role?

Connects small and large intestine.

What is Hydrochloric acid's function?

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

What is Gastrin responsible for?

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

What does Gastric juice contain?

Contains HCl, mucus, intrinsic factor, and digestive enzymes.

What does Cholecystokinin do?

Stimulates secretion of pancreatic juice rich in digestive enzymes and causes ejection of bile from gall bladder.

What is Amylases' function?

Responsible for most of carbohydrate enzymatic digestion.

What is Segmentation?

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

What is Peristalsis?

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

What do Enteroendocrine cells (G-cells) secrete?

Secrete Gastrin that diffuse into the blood capillaries.

What do Chief cells secrete?

Secrete pepsinogen.

What is the function of the Gallbladder?

Stores and releases bile for the emulsification and absorption of lipids.