Stomach

Stomach

“What is the stomach? A detailed question and answers guide”

Functions of stomach.
Answer:

stomach Functions:

1. Mechanical function:

1. Storage function:
   • Stomach serves as a reservoir for the food ingested.
   • Food remains in the stomach for 22-3 hours and passes gradually into the intestine.
   • This provides enough time for proper digestion and absorption of food substances in the small intestine.
2. Formation of chyme:
   • The peristaltic movements of stomach mix the bolus with gastric juice and convert it into chyme.

“Understanding the stomach through FAQs: Composition, functions, and uses explained”

2. Digestive function:

1. Enzymes present in the gastric juice of stomach helps in the digestion of various nutritive substances.
   • Pepsin digest proteins.
   • Amylase digests starch.
   • Lipase – hydrolyses fatty acid.
   • Gelatinase digests gelatin.
   • Urease converts urea into ammonia.

“Importance of studying the stomach for medical students: Questions explained”

3. Protective function:

• Thick mucus is present in gastric juice.
• This mucus.
  1. Protect stomach wall from irritation.
  2. Prevents digestive action of pepsin on stomach wall.
  3. Protects gastric mucosa from HCI.

4. Hemopoietic function:

• Intrinsic factor is present in gastric juice.
• This is necessary for absorption of Vit B₁₂ from the small intestine.
• Vit  B₁₂ is one of the maturation factor for erythropoiesis.

“Common challenges in mastering stomach notes effectively: FAQs provided”

5. Excretory function:

• Many substances like toxins, alkaloids, metals are excreted through gastric juice.