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Digestive System Test

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Which of the following is NOT associated with the mouth:
a. hard palate
b. rugae
c. vestibule
d. tongue
e. soft palate
b. rugae
What is the correct order of how food passes in the alimentary canal:
mouth
pharynx
esophagus
stomach
small intestine
large intestine
the structure that forms the anterior roof of the mouth is the:
hard palate
the fold of mucous membrane that secures the tongue to the floor of the mouth and limits its posterior movements is called the:
lingual frenulum
What is continuous with the esophagus?
laryngopharynx
what is the moist innermost layer that lines the alimentary canal?
mucosa
the release of food from the stomach into the small intestine is regulated by the:
pyloric sphincter (valve)
protein digestion begins in the
stomach
What modification increases surface area in the small intestine with fingerlike extensions of the mucosa:
villi
The small intestineextends from the:
pyloric sphincter to the ileocecal valve
what two organs release secretions into the duodenum of the small intestine
liver and pancreas
enzymes and bile are carried by the pancreatic duct and bile duct into the
deuodenum
the primary function of the small intestine is
absorption of nutrients
which one of the following is NOT a subdivision of the large intestine:
a. cecum
b. appendix
c. duodenum
d. colon
e. rectum
duodenum
the organ responsible for drying out indigestible food residue through water absorption and the elimination of feces is the:
large intestine
what is the purpose of mastication:
to chew, grind and tear food into smaller pieces while in the mouth
amylase is an enzyme that is only able to digest
starch
the number of permanent teeth within a full set of adult teeth is:
32
the anterior chisel-shaped teeth that are adapted for cutting are called:
incisors
bile is produced by the ___ but stored in the ____.
liver; gallbladder
which tube brings bile directly back into the gallbladder for storage when there is no digestion occurring in the duodenum
cystic duct
The sequence of steps by which large food molecules are broken down into their respective building blocks by catalytic enzymes within hydrolysis reactions is called:
chemical digestion
The propulsive process that moves food from one organ to the next called:
peristalsis
The process by which food within the small intestine is mixed with digestive juices by backward and forward movement across the internal wall of the organ is called:
segmentation
Which one of the following is NOT of the carbohydrates that the human digestive system is able to break down to simple sugars:
cellulose
Proteins are digested to their building blocks which are called:
amino acids
Transport of digested end products from the lumen of the GI tract into the bloodstream or lymphatic fluid is called:
absorption
The first nutrient to be chemically digested is:
starch
What alimentary segment has NO digestive function?
esophagus
Pepsin is necessary for the stomach to break down:
proteins
The enzyme responsible for converting milk protein in the stomach to a substance that looks like sour milk in infants is:
rennin
What is not absorbed by the human large intestine
protein
Which one of the following is NOT a main role of the live:
a. detoxify drugs and alcohol
b. degrade hormones
c. to make cholesterol
d. process nutrients during digestion
e. add ammonia to the blood
E. add ammonia to the blood
Nutrients detour through the liver via the:
hepatic portal circulation
Proteins break down
pepsinogens
Lactose break down
lactase
Starch break down
amalyse
Fat break down
lipase
Nucleic acids break down
nuclease
Primary site of water absorption
large intestine
Site where starch digestion begins
mouth
tube through which food is propelled but no digestion takes place
esophagus
site where protein digestion begins
stomach
site where pancreatic enzymes and bile enter the alimentary canal
duodenum
site of vitamin K synthesis by bacteria
large intestine
site where defection reflex is initiated
rectum