Understanding the Digestive System

What is the first stage of the digestive system?

• Propulsion

• Ingestion

• Absorption

• Defecation

Which enzyme is responsible for breaking down starches in the mouth?

• Pepsin

• Pancreatic lipase

• Salivary amylase

• Nucleases

What is the primary function of mechanical digestion?

• To use enzymes to break down food

• To physically tear apart food into smaller pieces

• To absorb nutrients into the bloodstream

• To eliminate waste from the body

Where does the digestion of proteins begin?

• Mouth

• Stomach

• Small intestine

• Large intestine

Which enzyme is secreted by the pancreas to aid in lipid digestion?

• Pepsin

• Salivary amylase

• Pancreatic lipase

• Nucleases

What is the role of nucleases in the digestive system?

• To break down carbohydrates

• To break down proteins

• To break down lipids

• To break down nucleic acids

Which stage of the digestive system involves the movement of food through the alimentary canal?

• Ingestion

• Propulsion

• Absorption

• Defecation

What is the main purpose of chemical digestion?

• To physically break down food

• To use enzymes to break complex molecules into simpler ones

• To absorb nutrients into the bloodstream

• To eliminate waste from the body

Which of the following is NOT a stage of the digestive system?

• Ingestion

• Filtration

• Absorption

• Defecation

Where are enzymes secreted to aid in the breakdown of macromolecules?

• Into the bloodstream

• Into the lumen of the alimentary canal

• Into the liver

• Into the gallbladder