Ch 1 - Digestion and Absorption Extra/Important Questions Flashcards
What provides the alkaline pH in the small intestine?
Mucous and Bicarbonates secreted by pancreas protects the intestinal mucosa from acid as well as provide an alkaline medium (pH7.8) for enzymatic activities. Sub-mucosal glands (Brunner’s glands) also help in this.
Function of Mucous(and bicarbonates) in various regions of digestive system
Mouth - Lubrication/ Adhere into bolus
Stomach - Protect from acid
Small Intestine - Protect from acid/provide alkaline medium
Trypsinogen is an inactive enzyme of pancreatic juice. An enzyme, enterokinase, activates it. Which tissue/ cells secrete this enzyme? How is it activated?
Intestinal Mucosa
Into Active Trypsin
In which part of alimentary canal does absorption of water, simple sugars and alcohol takes place?
Stomach
Name the enzymes involved in the breakdown of nucleotides into sugars and bases?
Nucleosides/Nucleotides➡️Nucleosidases/Nucleotidases➡️Sugars+Bases
What is pancreas? Mention the major secretions of pancreas that are helpful in digestion
The pancreas is a compound (both exocrine and endocrine) elongated organ situated between the limbs of the ‘C’ shaped duodenum. The exocrine portion secretes an alkaline pancreatic juice containing inactive enzymes such as trypsinogen, chymotrypsinogen, procarboxypeptidases, amylases, lipases and nucleases.
Name the part of the alimentary canal where major absorption of digested food takes place. What are the absorbed forms of different kinds of food materials?
Duodenum[Small Intestine]
Proteins➡️Amino Acids
Fat➡️Fatty acids and Glycerol
Carbohydrates➡️Simple sugars and glucose
How are the activities of gastro-intestinal tract regulated?
The activities of the gastro-intestinal tract are under neural and hormonal control for proper coordination of different parts.The muscular activities of different parts of the alimentary canal can also be moderated by neural mechanisms, both local and through CNS.
A person had roti and dal for his lunch. Trace the changes in those during its passage through the alimentary canal.
Not digestion but change
therefore mention bolus,chyme,faeces
What are the various enzymatic types of glandular secretions in our gut helping digestion of food? What is the nature of end products obtained after complete digestion of food?
https://www.toppr.com/ask/question/dsfghjkl845120-3/
[mention secretions from gastric glands,salivary gland,liveer,pancreas,intestine,rennin]
What will happen if the secretion of parietal cells of gastric glands isblocked ?
a. Enterokinase will not be released from the duodenal mucosa and so trypsinogen is not converted to trypsin
b. Gastric juice will be deficient in chymotrypsin
c. Gastric juice will be deficient in pepsinogen
d. Inactive pepsinogen is not converted into the active enzyme pepsin.
No HCl
No Intrinsic Factor
No absorption of Vit B12
[option D because no HCl production]
