QUIZ 3
1. Which layer of the digestive tract is in direct contact with the food that is consumed?
mucosa
muscularis
serosa
submocusa
2. The number of premolar deciduous teeth is
0
2
4
8
12
3. Which of these glands does not secrete saliva into the oral cavity?
submandibular gland
pancreas
sublingual gland
parotid gland
4. The portion of the digestive tract in which digestion begins is the
oral cavity
esophagus
stomach
duodenum
jejunum
5. The stomach
has large folds in the submucosa and mucosa called rugae.
has two layers of smooth muscle in the muscularis tunic.
opening from the esophagus is the pyloric opening.
has an area closest to the duodenum called the fundus.
All of these are correct
6. Why doesn’t the stomach digest itself?
The stomach wall is not composed of protein, so it is not affected by proteolic enzymes
The digestive enzymes of the stomach are not strong enough to digest the stomach wall
The lining of the stomach wall has a protective layer of epithelial cells
The stomach wall is protected by large amounts of mucus.
7. Which of these structures increase the mucosal surface of the small intestine?
circular folds
villi
microvilli
length of the small intestine
All of these are correct
8. Which of the following might occur if a person suffers from a severe case of hepatitis
that impairs liver function?
Lipid digestion is difficult.
By-products of hemoglobin breakdown accumulate in the blood.
Plasma proteins decrease in concentration.
Toxins in the blood increase.
All of these occur
9. The gall bladder
produces bile
stores bile
contracts and releases bile in response to secretin
contracts and releases bile in response to sympathetic stimulation.
Both b and c are correct.
10. The aqueous pancreatic juice
is secreted by the pancreatic islets.
contains HCO3−
is released primarily in response to cholecystokinin
passes directly into the blood.
All of these are correct.
11. Which of these is not a function of the large intestine?
absorption of glucose
absorption of certain vitamins
absorption of water and salts
production of mucus
12. Which of these structures produces enzymes that digest carbohydrates?
salivary glands
pancreas
lining of the small intestine
Both a and b are correct
All of these are correct
13. Bile
a) is an important enzyme for the digestion of lipids.
b) is made by the gallbladder.
c) contains breakdown products from hemoglobin.
d) emulsifies lipids
Both c and d are correct
14.Which one of the following shows organs in the order that food/bolus/chyme would
pass through
Oesophagus, duodenum, stomach and small intestine
Oesophagus, stomach, large intestine and small intestine
Mouth, oesophagus, stomach, liver and duodenum
Oesophagus, stomach, small intestine and large intestine
Mouth, oesophagus, duodenum, stomach and ileum
15. Which one of the following are accessory organs of the digestive system?
Liver
Pancreas
Salivary glands
Gall bladder
All of the above
16. Which accessory organ of the digestive system produces bile?
Liver
Pancreas
Salivary Glands
Gall bladder
Duodenum
17. Which one of the following is a correct matching pair of organ/structure to its
function?
Oesophagus – transports bolus to duodenum
Stomach – absorption of nutrient molecules
Large intestine – absorption of water
Mouth – protein digestion
Small intestine – mechanical digestion
18. What is the correct role of the epiglottis?
a) Increases surface area for greater food absorption
b) Regulates the movement of chyme from the stomach to the duodenum
c) Closes of the trachea to stop food entering the respiratory system
d) Regulates the movement of the bolus from the duodenum to the jejunum
e) Initiates peristalsis in the large intestine
19. What is unique about the muscles in the stomach compared to the rest of the
digestive system?
a) They run only in one direction
b) There are three layers of muscle
c) The stomach consists of only cardiac muscle
d) The muscle cells are multi-nucleated
e) The muscles are voluntary.
