Understanding Stomach Function

The video explains the digestive process in the stomach. Before eating, the brain signals the stomach to start producing secretions. Food enters through the cardia, and the fundus adapts to the volume of food and air. Gastric juice, primarily composed of gastric acid, is produced in the stomach body to eliminate bacteria and prepare food for digestion. The stomach's muscular contractions mix the food with gastric juice, breaking it down before passing it to the intestine via the pylorus. As the stomach empties, it returns to its original size.

What triggers the production of secretions in the stomach before eating?

• Impulses from the brain

• The presence of food in the mouth

• Swallowing air

• The act of chewing

What is the role of the cardia in the stomach?

• It produces gastric juice

• It eliminates bacteria in the food

• It acts as a valve at the stomach entrance

• It churns the food mass

Where is the food and air collected in the stomach?

• In the pylorus

• In the body

• In the fundus

• In the cardia

What is the main component of gastric juice?

• Pancreatic juice

• Saliva

• Gastric acid

• Bile

How many contractions per minute move the food mass back and forth in the stomach?

• Two

• One

• Three

• Four

Through which part does the stomach pass its contents into the intestine?

• Cardia

• Fundus

• Body

• Pylorus