The video explains how the digestive system breaks down food molecules through chemical digestion. It describes the process of breaking down carbohydrates into sugars, proteins into amino acids, and fats into fatty acids, all facilitated by specific enzymes. These smaller molecules are then absorbed into the bloodstream and transported to cells that need them.

What is the primary function of enzymes in the digestive system?

• To increase the size of food particles

• To break down large molecules into smaller, absorbable ones

• To absorb nutrients directly into the bloodstream

• To transport nutrients to cells

Which food items are primarily broken down into sugars during digestion?

• Meats and eggs

• Vegetable oils

• Bread, rice, and potatoes

• Dairy products

What is the end product of carbohydrate digestion?

• Amino acids

• Sugars

• Fatty acids

• Vitamins

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What are proteins broken down into during chemical digestion?

• Sugars

• Fatty acids

• Amino acids

• Glycerol

What role do enzymes play in the digestion of proteins?

• They extract proteins from food

• They break proteins into amino acids

• They neutralize proteins

• They enlarge protein molecules

Which molecules are fats broken down into by enzymes?

• Amino acids

• Minerals

• Sugars

• Fatty acids

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NGSS.MS-LS1-7

Which enzyme is responsible for breaking down fats?

• Protease

• Lactase

• Lipase

• Amylase

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What is the significance of fatty acids in the body?

• They act as a source of energy and are components of cell membranes

• They provide structural support to cells

• They are used primarily for energy storage

• They help in transporting proteins

How do nutrients reach the cells after digestion?

• Through the respiratory system

• Via the circulatory system

• Through direct absorption by cells

• Via osmosis

What is the primary outcome of chemical digestion in the intestines?

• Production of enzymes

• Absorption of large food molecules

• Breakdown of food into nutrients

• Extraction of water from food

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