Understanding the Human Digestive System

What is the primary function of the human digestive system?

• To transport nutrients to cells

• To break down food into nutrients

• To produce hormones

• To circulate blood

Which enzyme begins the digestion of carbohydrates in the mouth?

• Lipase

• Pepsin

• Trypsin

• Amylase

How is food transported from the mouth to the stomach?

• Through peristalsis

• Via direct absorption

• Using gravity alone

• Through osmosis

What triggers the release of gastric acid?

• Eating spicy food

• Drinking water

• Consuming fats

• The sight and smell of food

What protects the stomach wall from gastric acid?

• Bile

• Saliva

• Mucus

• Pancreatic juice

What is the role of hydrochloric acid in the stomach?

• To neutralize enzymes

• To absorb nutrients

• To break down fats

• To destroy harmful bacteria

What is the function of the pyloric sphincter?

• To absorb nutrients

• To produce bile

• To regulate the entry of chyme into the duodenum

• To secrete enzymes

What is the optimum pH value for pancreatic enzymes to function?

• 7-8

• 1-2

• 4-5

• 9-10

What is the role of pancreatic lipase?

• To break down proteins

• To neutralize stomach acid

• To absorb vitamins

• To digest fats

How does bile aid in the digestion of fats?

• By absorbing nutrients

• By emulsifying fats

• By producing enzymes

• By neutralizing acids