Digestion and Absorption of Food

The video explains the digestion process, detailing mechanical and chemical breakdowns of food. It covers the digestion of carbohydrates, proteins, lipids, and nucleic acids, highlighting the enzymes involved and the absorption of nutrients in the GI tract. The absorption of water, ions, and vitamins is also discussed, emphasizing the roles of active and passive transport.

What is the process called that moves food from the mouth to the stomach?

• Deglutition

• Absorption

• Mastication

• Peristalsis

Which enzyme is responsible for converting starch into maltose in the mouth?

• Sucrase

• Lactase

• Salivary amylase

• Pancreatic amylase

How are glucose and galactose absorbed into the blood capillaries?

• Simple diffusion

• Facilitated diffusion

• Secondary active transport

• Primary active transport

Which enzyme in the stomach is activated by hydrochloric acid?

• Pepsinogen

• Carboxypeptidase

• Chymotrypsinogen

• Trypsinogen

What is the role of bile salts in fat digestion?

• They activate gastric lipases

• They emulsify large fat globules into small droplets

• They convert triglycerides to monoglycerides

• They absorb fatty acids

Which enzyme breaks down nucleotides into nucleosides and phosphate?

• Ribonuclease

• Nucleosidase

• Deoxyribonuclease

• Nucleotidase

How are fat-soluble vitamins absorbed in the digestive system?

• By active transport

• With the help of micelles

• Through osmosis

• By passive transport