Understanding Digestion

The video explores the human digestive system, detailing how food is processed and nutrients are absorbed. It covers the journey of food from ingestion to excretion, highlighting the roles of the stomach, small intestine, and large intestine. The video also explains energy extraction from food and the importance of a balanced diet. Additionally, it discusses the kidneys' role in water balance and waste excretion.

What percentage of our daily energy is used for digestion?

• 10%

• 20%

• 40%

• 30%

What action prevents food from entering the nose during swallowing?

• Tongue pushing

• Soft palate raising

• Epiglottis closing

• Larynx opening

What is the primary function of the stomach in digestion?

• Pulverize food

• Break down proteins

• Store bile

• Absorb nutrients

Which enzyme in saliva begins the breakdown of starch?

• Amylase

• Pepsin

• Protease

• Lipase

What is the role of villi in the small intestine?

• Store vitamins

• Secrete enzymes

• Absorb nutrients

• Produce bile

Which organ produces bile?

• Liver

• Stomach

• Gallbladder

• Pancreas

What is the primary function of the large intestine?

• Digest proteins

• Absorb water

• Produce enzymes

• Store bile

What percentage of water is reclaimed by the large intestine?

• 60%

• 75%

• 50%

• 66%

How often does all the blood in the body pass through the kidneys?

• Every 2 minutes

• Every 5 minutes

• Every 15 minutes

• Every 10 minutes

What is the final stage of the digestive process?

• Ingestion

• Digestion

• Absorption

• Excretion