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WorksheetsU5L3 Small Intestines Opener
Total questions: 10
Worksheet time: 10mins
What are the functions of the digestive system?
digestion, absorption, elimination
ingestion, congestion, elimination
congestion, digestion, elimination
Where does most absorption of nutrients take place?
Stomach
Small intestine
Large intestine
Gall bladder
What are these structures call that are found on the lining of the small intestine?
Cilia
Villi
Sphincter
Duodenum
This membrane holds the coils of the small intestine together:
mesentery
greater omentum
serosa
intestinal villi
What structure is
highlighted in blue?
Gallbladder
Greater Omentum
Liver
Pancreas
Stomach
What must happen to food molecules AS or BEFORE they reach the middle of the small intestine, for digestion to be successful?
the molecules have to be broken into smaller molecules
food molecules have to be joined together to make bigger molecules
food molecules have to be elimated
food molecules have to disappear
What is the function/goal of the VILLI in the small intestine, based on what you saw in the simulation?
increase space for absorption of food molecules
create enzymes
to help move food through the intestine
to help break down food molecules
Match the following
Break down peptides into amino acids
peptidases
breaks down disaccharides into monosaccharides
Sucrase, Maltase, Lactase
Breaks down fats into fatty acids and glycerol
Lipase
Salivary and pancreatic amylase break down starch and glycogen into disaccharides
Intestinal enzymes break down disaccharides into monosaccharides
Monosaccharides are absorbed by the villi and go to the blood stream
Pepsin in the stomach breaks down proteins into polypeptides
Pancreatic proteases break down proteins and polypeptide into smaller peptides
Intestinal peptidases break peptides into amino acids.
Amino acids are absorbed by active transport into blood vessels of villi.
Fats are emulsified by bile salts
Fats are digested mainly by enzymes from pancreas and small intestine
Fats are digested into glycerol and fatty acids
Fatty acids and glycerol are absorbed by a process involving several steps
Reorder the following steps to fat absorption
Fatty acids enter the epithelial cells via the villi
Fatty acids are used to synthesize fats in the endoplasmic reticulum (package and send out)
Fat is encased in a protein cluster; chylomicrons
Chylomicrons leave the epithelial cells and enter lacteal (lymph vessel)
Lymph in lacteal transports chylomicrons away from intestines
