bio 18 Flashcards
the digestive system is often called the ____ _____
alimentary canal
4 steps to food processing
ingestion
digestion
absorption
elimination
two types of digestion
mechanical and chemical
what three things does the mouth do to aid digestion
moistens food with saliva
grinds food with teeth
begins chemical breakdown of starches
starch turns into ____
maltose
what is the esophagus
muscular tube that carries food to the stomach
the stomach produces what two things
digestive enzymes and HCI
protein digestion begins in the
stomach
____ and HCI are screted into the stomach
pepsinogen
HCI converts pepsinogen into ____
pepsin
pepson then activates more ____ into ____
pepsinogen into pepsin
what does the pyloric sphincter do
regulates entry of food into small intestine
what 3 things happen in the small intestine
chemical digestion
absorption of nutrients
secretion of digestive enzymes
3 areas of the small intestine
duodenum
jujenum
ilium
5 things the large intestine does
reabsorption of water into blood stream
storage and elimination of solid waste
secretion of mucus
decomposition of organic material
production of vitamins
3 parts of the large intestine
ascending
transverse
descending
3 accessory organs
pancreas
liver
gall bladder
what does the pancreas do
produces digestive enzymes
3 digestive enzymes
pancreatic amylase
lipase
trypsin
what is produced and stored in the liver
production of bile salts
stores bile
what does the gallbladder do
stores and releases bile into the small intestine
2 functions of bile
breaks down large fat globules into smaller particles
smaller particles easier to break down with enzymes
