Concept 6.1 Lecture Video and Quiz

What is the primary function of the digestive system?

• To filter blood

• To produce hormones

• To store food for long periods

• To convert food into energy and raw materials

Which of the following is NOT a macromolecule broken down by the digestive system?

• Proteins

• Lipids

• Vitamins

• Carbohydrates

What is another term for the alimentary canal?

• Nervous system

• Gastrointestinal tract

• Cardiovascular system

• Respiratory tract

Which organ is NOT part of the alimentary canal?

• Stomach

• Liver

• Esophagus

• Mouth

What is the first step in the digestion process?

• Ingestion

• Absorption

• Propulsion

• Defecation

What is the term for the ball of chewed food in your mouth?

• Bolus

• Chyme

• Enzyme

• Mucus

What is the purpose of mechanical breakdown of food?

• To increase surface area for absorption

• To chemically alter food

• To eliminate waste

• To store food

Where does the absorption of nutrients primarily occur?

• Large intestine

• Small intestine

• Mouth

• Stomach

What is the final step in the digestion process?

• Defecation

• Absorption

• Ingestion

• Propulsion

Which layer of the GI tract secretes mucus, enzymes, and hormones?

• Serosa

• Mucosa

• Submucosa

• Muscularis externa