W11 Digestive System Flashcards
(24 cards)
what do autotrophs do
use external energy to create organic molecules
what do heterotrophs do
use organic molecules from others
what are all heterotrophs known as
decomposers
what do all animals need
fuel for respiration
H2O
C,O,H,N,P
vitamins and AA
which animal cant create vitamin C
primates
what does the mouth do in the digestive system
physical and chemical breakdown of food
what does saliva do
break down starch with amylase
what does the stomach do in the digestive system
churns food
pepsinogens added
what is released in the stomach to prevent the ph 2 acid from digesting iteself
mucus
what does the duodenum do in the digestive system
neutralise the acid by adding bicarbonate
what does the liver secrete
bile
where is bile stored
gallbladder
what does bile help to do
emulsify fat
what does the small intestine do in the digestive system
absorption
what helps to digest chyme in the digestive system
gut flora
what happens in the large intestine (colon)
microbiome for more water reabsorption
what is the rectum for
storing waste
what is the enteric nervous system (ENS) for
regulates gastric and pancreatic secretion
what is gastrin stimulated by
food being in the stomach
what happens when chyme enters the duodenum
releases hormone to slow stomach down
what does ghrelin do
triggers hunger
what does leptin do
produces adipose tissue to suppress appetite
what does PYY do
- suppress appetite short term
- release counterghrelin
what happens when not enough leptin is produced
obesity
