Digestive System Functions and Processes

The video tutorial explains the digestive system, highlighting the process of digestion, the role of various organs, and the importance of enzymes. It covers the adaptations of the small intestine for absorption and the function of the large intestine in excretion. The tutorial also introduces key enzymes and additional organs like the pancreas and liver, providing a comprehensive overview for GCSE students.

What is the primary function of the digestive system?

• To store energy

• To produce hormones

• To break down food into absorbable molecules

• To circulate blood throughout the body

Which organ is responsible for mechanically breaking down food?

• Stomach

• Esophagus

• Mouth

• Small intestine

What is the role of hydrochloric acid in the stomach?

• To neutralize stomach acids

• To break down proteins

• To absorb nutrients

• To produce bile

How does the small intestine increase its surface area for absorption?

• By having a smooth surface

• By being very long

• By producing more enzymes

• By having villi and microvilli

What ensures a steep concentration gradient in the small intestine?

• A high enzyme concentration

• A short diffusion distance

• A large surface area

• A good blood supply

Where is water absorbed in the digestive system?

• Mouth

• Stomach

• Small intestine

• Large intestine

Which enzyme is produced by the salivary glands?

• Pepsin

• Amylase

• Lipase

• Protease

What is the function of bile in digestion?

• To break down carbohydrates

• To speed up enzyme action

• To absorb fats

• To produce hormones

Which organ stores bile before it is released into the intestines?

• Liver

• Pancreas

• Stomach

• Gallbladder

What is the role of the pancreas in digestion?

• To produce digestive enzymes

• To break down proteins

• To store bile

• To absorb nutrients