Digestion and Absorption - Online Test
Q1. The secretions released into small intestine are
Answer : Option D
Explaination / Solution:
The bile, pancreatic juice and the intestinal juice are the secretions released into the small intestine.
Q2. Which layer of alimentary canal forms crypts in between the base of villi?
Answer : Option C
Explaination / Solution:
Mucosa forms gastric glands in the stomach and crypts in between the bases of villi in the intestine (crypts of Lieberkuhn).
Q3.
Answer : Option B
Explaination / Solution:
An amylase is an enzyme that catalyses the hydrolysis of starch into sugars. Amylase is present in the saliva of humans and some other mammals, where it begins the chemical process of digestion. it is a major digestive enzyme, and its optimum pH is 6.8
Q4. Active form of Which enzyme hydrolyses milk protein in stomach?
Answer : Option B
Explaination / Solution:
Rennin is a proteolytic enzyme found in gastric juice of infants which helps in the digestion of milk proteins.
Q5. Correct sequence of layers in gut wall from inside to outside is :
Answer : Option B
Explaination / Solution:
Serosa is the outermost layer while mucosa is the innermost layer. The layer next to mucosa is the sub-mucosa containing nerves, blood and lymph vessels. Muscularisis found between sub-mucosa and serosa.
Q6. One of the gut hormones which is often referred to as the "hunger hormone" since it works as a strong stimulant for appetite and feeding is :
Answer : Option C
Explaination / Solution:
Ghrelin the hunger hormone is a peptide hormone produced by ghrelinergic cells in the gastrointestinal tract which function as neurpeptide in the central nervous system. It stimulates appetite and feeding.
Q7. Numerous folds present on inner surface of stomach are called rugae. Another part of digestive tract which contains rugae is
Answer : Option A
Explaination / Solution:
Numerous folds present on inner surface of stomach are called rugae. They are series of ridges produced by folding of the wall of an organ. Another part of digestive tract which contain rugae is palate, the top part of inside mouth.
Q8. Which of the following is not secreted from its source in the form of a Zymogen :
Answer : Option D
Explaination / Solution:
Zymogen is an inactive enzyme precursor that require biochemical change to become active. Amylase enzyme is not released from its source in the form of proenzyme or zymogen.
Q9. Which of the following is not a part of human alimentary canal?
Answer : Option B
Explaination / Solution:
The Ilium is the uppermost and largest bone of the pelvis in vertebrates. Duodenum jejunum and colon are parts of human alimentary canal but ileum is not a part of this system.
Q10. The correct sequence of lipid digestion in alimentary canal is :
Answer : Option A
Explaination / Solution:
Digestion of (lipid) fat begins in small intestine by secretion of bile juice that contains bile salts. Bile salt emulsify the lipids into globules that is further simplified into micelles and chylomicrons.
