Human digestive System

Which of the following correctly describes the purpose of digestion?

• To break down complex food molecules into simple soluble molecules

• To make complex food molecules from simple soluble molecules

• To make use of simple soluble food molecules

• To remove complex food molecules from the body

Where is the digestion of food completed?

• liver

• large intestine

• stomach

• small intestine

Large food molecules need to be broken down to be small enough to pass through cell membranes.

• True

• False

Which of the following kills bacteria in the human alimentary canal?

• gastric juice

• mucus

• pancreatic juice

• saliva

When many large carbohydrates are chemically digested they are broken into many smaller _____

• proteins
• amino acids
• simple sugars
• enzymes

Where does carbohydrate digestion begins?

• liver

• mouth

• oesophagus

• stomach

Where does chemical digestion begin?

• mouth
• esophagus
• stomach
• small intestine

A part of digestive system that secretes bile for emulsifying fats

• Liver

• Lungs

• Gall Bladder

• Pancreas

What organ is this?

• stomach
• small intestine
• large intestine
• esophagus

Which organ stores bile?

• stomach

• gallbladder

• pancreas

• liver