Digestion and Absorption - Online Test
Q1. Which among the following is not in the wall of alimentary canal?
Answer : Option B
Explaination / Solution:
The wall of alimentary canal from oesophagus to rectum possesses four layers namely serosa, muscularis, sub-mucosa and mucosa.
Q2. Which layer of alimentary canal forms villi?
Answer : Option C
Explaination / Solution:
Mucosa layer forms irregular folds (rugae) in the stomach and small finger-like foldings called villi in the small intestine
Q3.
Read the following statements :
i. Opening of hepato-pancreatic duct into jejunum is guarded by Sphincter of Oddi.
ii. Duodenum receives bile-pancreatic duct.
Answer : Option A
Explaination / Solution:
Duodenum receives bile from pancreatic duct. Bile contains bile juice that contain bile salt used for emulsification of fat. Sphincter of Oddi is not present between hepatic-pancreatic duct into jejunum.
Q4. The dental formula for human deciduous and permanent set are :
212/212 and 2123/2123
So the deciduous set lacks :
Answer : Option B
Explaination / Solution:
Arrangement of teeth in each half of the upper and lower jaw in the order I, C, P, M,
is represented by a dental formula which in human is 2123/2123. 212/212 lacks premolar.
Q5.
Match the following:
| Nutrient | Absorbable Forms |
| a) Carbohydrate | i) Amino acids |
| b) Nucleic acid | ii) Monosaccharides |
| c) Proteins | iii) Sugar and bases |
| d) Lipids | iv) Fatty acids and glycerol |
Answer : Option B
Explaination / Solution:
Carbohydrate are converted into monosaccharides, nucleic acid are converted into sugar and bases by nucleosidases, proteins are converted into amino acids by dipeptidases and lipids are converted into fatty acids and glycerol by lipases.
Q6. Which layer of alimentary canal is formed of loose connective tissues?
Answer : Option D
Explaination / Solution:
The submucosa consists of a dense and irregular layer of loose connective tissue with blood vessels, lymphatics, and nerves branching into the mucosa and muscular layer. It contains the submucous plexus, and enteric nervous plexus, situated on the inner surface of the muscular layer.
Q7. The enzyme which hydrolyze the starch is
Answer : Option B
Explaination / Solution:
The enzymes that break down or hydrolyze starch into the constituent sugars are known as amylases.
Alpha-amylases are found in plants and in animals.
Human saliva is rich in amylase, and the pancreas also secretes the enzyme.
Q8. What should be filled in to replace question mark in the following sequence :?
Trypsinogen →Trypsin
Answer : Option A
Explaination / Solution:
Trypsinogen is activated by an enzyme, enterokinase, secreted by the intestinal mucosa into active trypsin.
Q9. The arrows represent :[upward to downward]
Answer : Option C
Explaination / Solution:
The figure shows the muscular sac called the gall bladder. The duct of gall bladder (cystic duct) along with the hepatic duct from the liver forms the common bile duct.
Q10. The arrows represent :[upward to downward]
Answer : Option C
Explaination / Solution:
The figure shows the muscular sac called the gall bladder. The duct of gall bladder (cystic duct) along with the hepatic duct from the liver forms the common bile duct.
