GCSE Biology - Digestive System #18

The video explains the human digestive system, detailing the process from ingestion to excretion. It covers the breakdown of food into nutrients, the role of enzymes, and the absorption of nutrients in the small intestine. The video also describes the function of the stomach, pancreas, liver, and gallbladder in digestion, and concludes with the absorption of water in the large intestine.

What is the primary role of saliva in the digestive process?

• To break down proteins

• To emulsify fats

• To make food more liquid and begin carbohydrate digestion

• To neutralize stomach acid

Which enzyme is produced by the stomach to aid in protein digestion?

• Trypsin

• Pepsin

• Lipase

• Amylase

What is the function of bile in the digestive system?

• To emulsify fats and neutralize stomach acid

• To break down carbohydrates

• To digest proteins

• To absorb water

Where are most digestive enzymes produced?

• In the gallbladder

• In the pancreas

• In the stomach

• In the liver

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

• Stomach

• Gallbladder

• Pancreas

• Liver

What is the primary function of villi in the small intestine?

• To secrete bile

• To increase surface area for nutrient absorption

• To produce digestive enzymes

• To neutralize stomach acid

What happens to the leftover material in the large intestine?

• Water is absorbed, leaving behind feces

• It is stored in the gallbladder

• It is absorbed into the bloodstream

• It is broken down by enzymes