Digestive System Functions and Processes

The video provides an in-depth look at the digestive system, explaining its functions and processes. It covers the six main activities: ingestion, propulsion, mechanical digestion, chemical digestion, absorption, and defecation. Each process is detailed, highlighting the role of enzymes and the importance of nutrient absorption in the small intestine. The video concludes with a summary of the digestive process and its efficiency in nutrient absorption.

What is the primary purpose of the digestive system?

• To protect the body from infections

• To regulate body temperature

• To break down food and absorb nutrients

• To circulate blood throughout the body

Which enzyme in saliva begins the digestion of carbohydrates?

• Pancreatic lipase

• Salivary amylase

• Lingual lipase

• Pepsin

What is the role of peristalsis in the digestive system?

• To break down food into smaller particles

• To move food along the digestive tract

• To absorb nutrients into the bloodstream

• To produce digestive enzymes

Where does the majority of chemical digestion occur?

• Large intestine

• Small intestine

• Stomach

• Mouth

Which enzyme is responsible for breaking down proteins in the stomach?

• Maltase

• Lipase

• Pepsin

• Salivary amylase

What is the primary site of nutrient absorption in the digestive system?

• Esophagus

• Stomach

• Large intestine

• Small intestine

Which part of the small intestine is primarily responsible for absorbing carbohydrates and proteins?

• Duodenum

• Jejunum

• Ileum

• Cecum

What is the main function of the large intestine?

• To break down carbohydrates

• To absorb water and vitamins

• To produce bile

• To digest proteins

Which vitamin is absorbed in the large intestine with the help of bacterial flora?

• Vitamin C

• Vitamin K

• Vitamin A

• Vitamin D

What is the process of eliminating undigested food from the body called?

• Absorption

• Digestion

• Ingestion

• Defecation