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

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

• gastric juice

• mucus

• pancreatic juice

• saliva

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

• True

• False

What part of the digestive system is highlighted?

• Large intestine

• Small intestine

• Stomach

• Appendix

Your large and small intestines are part of this body system.

• nervous

• digestive

• muscular

• skeletal

Tags

NGSS.MS-LS1-7

Please identify the organ that is responsible for the majority of digestion and absorption.

b

stomach

mouth

small intestine

large intestine

stomach

esophagus

Which statement is NOT true about proteins?

• Protein digestion begins in the mouth.

• Proteins are used for cell growth and repair.

• Proteins are broken down to form amino acids.

• Some complex proteins function as enzymes in the body.

Which enzyme does the stomach produce?

• amylase

• lipase

• maltase

• protease

Why is the oesophagus muscular?

• To break the food into even smaller pieces

• To produce enzymes to digest food

• To push food from the mouth into the stomach

• To move the food back and forth in two directions