biology chapter 2 Flashcards
name the tissues found in the stomach
glandular, muscular and epithelial
what is the function of glandular tissue in the stomach
release digestive juices
name the acid found in the stomach
hydrochloric
what is an enzyme
a biological catalyst
what do enzymes do in our digestive system
speed up the breakdown of our food
name the three main enzymes
amylase protease lipase
what enzyme is found in saliva
amylase
what type of food does amylase break down
starch
what type of food do lipase break down
fats/lipids
what type of food do protease break down
proteins
what is starch broken down into
glucose
what are fats broken down into
fatty acids and glycerol
what are proteins broken down into
amino acids
what enzyme is only released in the stomach
protease
what enzymes are released by the pancreas
protease, amylase and lipase
which part of the digestive system is the location for the digestion and absorption of food
small intestine
what is the name of the theory used to explain enzyme action
lock and key theory
where is bile stored
gall bladder
what are the two functions of bile
emulsify fats and provide alkaline conditions in the small intestine
name the chemical used to test for simple sugars
benedicts
what colour does benedict’s solution turn in the presence of sugars
from blue to orange/red
name the chemical used to test for starch
iodine
what colour does iodine turn in the presence of starch
from brown to black/blue
name the chemical used in the test for proteins
bieuret
what colour does bieurets solution turn in the presence of proteins
from blue to purple
what two factors influence enzyme activity
temperature and pH
what chemical, important in digestion, does the liver produce
bile
