Digestive System

What are the two main reasons why we eat food?

• To obtain energy and raw materials

• To satisfy cravings and indulge in our favorite dishes

• To socialize and bond with others

• To pass time and alleviate boredom

What are the two main components that both our body and the food we eat contain?

• Matter and energy

• Proteins and carbohydrates

• Atoms and molecules

• DNA and enzymes

Which system in our body is responsible for acquiring 'stuff' from the food we eat?

• Digestive system

• Respiratory system

• Circulatory system

• Nervous system

What are the four main kinds of biological molecules found in food?

• Lipids, carbohydrates, proteins, and nucleic acids

• Vitamins, minerals, fiber, and water

• Sugars, fats, amino acids, and enzymes

• Antioxidants, phytochemicals, fiber, and water

What is the purpose of breaking down the polymers of macromolecules in food?

• To obtain smaller monomers that our cells can use

• To increase the caloric value of the food

• To enhance the taste and flavor of the food

• To prevent spoilage and bacterial growth

Which organs form the continuous tube known as the alimentary canal?

• Mouth, pharynx, esophagus, stomach, small and large intestines

• Liver, pancreas, gallbladder, salivary glands

• Heart, lungs, kidneys, bladder

• Brain, spinal cord, nerves, sensory organs

What is the purpose of peristalsis in the digestive system?

• To propel food through the alimentary canal

• To mechanically break down food into smaller pieces

• To secrete enzymes for chemical digestion

• To absorb nutrients into the bloodstream

Which layer of the alimentary canal secretes mucus to protect the cells from digestive enzymes?

• Mucosal layer

• Submucosal layer

• Muscularis externa layer

• Epithelial layer

What is the main goal of the digestive process?

• To absorb nutrients into the cells

• To break down food into smaller molecules

• To eliminate waste from the body

• To produce energy for bodily functions

What happens to indigestible substances like fiber after the absorption of nutrients?

• They are eliminated from the body through defecation

• They are recycled and reused by the body

• They are stored as reserves for future energy needs

• They are broken down further into smaller molecules