Anatomy and Physiology of the Small Intestine

The video explains the digestion process, focusing on the small intestine's role in chemical digestion and absorption. It covers the anatomy of the small intestine, including the duodenum, jejunum, and ileum, and their specific functions. The video also discusses the role of accessory organs like the pancreas, liver, and gallbladder in digestion. Additionally, it highlights the hormonal regulation of digestion through secretin, CCK, GIP, and VIP.

What is the primary role of the stomach in digestion?

• Breakdown of proteins

• Breakdown of carbohydrates

• Absorption of water

• Absorption of nutrients

Which region of the small intestine is primarily responsible for absorption?

• Duodenum

• Jejunum

• Ileum

• Pylorus

What is the function of bicarbonate secreted by the pancreas?

• To digest proteins

• To neutralize stomach acid

• To break down fats

• To absorb nutrients

Which organ stores bile before it is released into the small intestine?

• Gallbladder

• Liver

• Stomach

• Pancreas

What is the role of secretin in the digestive process?

• Stimulates insulin release

• Inhibits gastric motility

• Neutralizes stomach acid

• Stimulates bile production

Which hormone is responsible for stimulating insulin release?

• VIP

• GIP

• Secretin

• Cholecystokinin

What triggers the release of vasoactive intestinal peptide (VIP)?

• Presence of glucose

• Acidic chyme

• Distension of the intestinal wall

• Free fatty acids

Which blood vessel is primarily responsible for draining the small intestine?

• Celiac artery

• Hepatic portal vein

• Superior mesenteric vein

• Inferior mesenteric vein

What is the main stimulus for the release of secretin?

• Free fatty acids

• Glucose

• Acid from the stomach

• Amino acids

Which hormone's release is triggered by free fatty acids and amino acids?

• VIP

• Cholecystokinin

• GIP

• Secretin