stomach

break down:

protein

rugae

folds in the stomach that allow it to expand (from eating)

sphincter between stomach and small intestine

pyloric sphincter

2-3 litres of ___ are secreted from the cells of the stomach every day 

gastric juices 

what is gastric juice made of

water, mucus, hydrochloric acid (HCl), and pepsinogen

Pepsinogen turns into ____ once activated with ____

pepsin when activated with hydrochloric acid

what does pepsin break proteins into

polypeptides 

stomach pH 

1-3 (with the help of HCl) 

what protects the stomach lining from being digested

alkaline mucus which coats the inner lining of the stomach

____ replaced every 3 days

stomach lining

peristalsis in the stomach

breaks the food into smaller pieces and incorperating it in with the gastric juices

also pushes chyme through the pyloric sphincter