What Does The Stomach Do

The video explains the stomach's role in digestion, highlighting its capacity to hold food and liquid. It describes the two types of digestion—mechanical and chemical—that occur in the stomach. The mucosa layer secretes gastric juice, which contains enzymes like pepsin to break down proteins. Stomach acid, while not primarily for digestion, protects against infections by killing harmful microorganisms. The stomach's muscular contractions, known as peristalsis, mechanically break down food, increasing its surface area for enzyme action. The processed food, now called chyme, moves to the small intestine, where pancreatic alkali neutralizes the acid.

What is the primary function of the enzyme pepsin in the stomach?

• To protect the stomach lining

• To break down carbohydrates into sugars

• To break down proteins into amino acids

• To neutralize stomach acid

What is the main purpose of stomach acid?

• To absorb nutrients

• To protect against infections

• To break down fats

• To digest carbohydrates

What is the term for the burning sensation caused by acid moving up the esophagus?

• Heartburn

• Gastritis

• Acid reflux

• Indigestion

What is the name of the muscular contractions that help mechanically break down food in the stomach?

• Peristalsis

• Churning

• Mastication

• Segmentation

What happens to chyme when it enters the small intestine?

• It is broken down by bile

• It is stored for later digestion

• It is neutralized by alkali from the pancreas

• It is absorbed directly into the bloodstream