C14 Human Digestive System

Why do we eat food?

• so that we would not be hungry

• we need to respire to release energy from food

• we need to produce energy

• we need to do work

Tags

NGSS.MS-LS1-7

Match the type of nutrient to the food.

• carbohydrates

• potatoes

• proteins

• butter

• fats

• pasta

• proteins

• beans

• carbohydrates

• tofu

Which word equation shows cellular respiration?

• glucose + carbon dioxide --> oxygen + water

• glucose + oxygen --> carbon dioxide + water + large amount of energy

• carbon dioxide + water --> glucose + oxygen + large amount of energy

Tags

NGSS.MS-LS1-7

What are enzymes?

• Nutrients for the body

• Biological molecules that speed up digestion.

• Biological molecules that slows down digestion.

• end products of digestion

Tags

NGSS.MS-LS1-7

Breaking up large pieces of food into smaller pieces. Happens mainly in the mouth and stomach.

• Physical Digestion

• Chemical Digestion

Breaking down large, insoluble food molecules into smaller, soluble food molecules by enzymes

• Physical Digestion

• Chemical Digestion

Match the nutrient to the enzyme that breaks it down.

• lipases

• fats

• carbohydrases

• proteins

• proteases

• carbohydrates

Tags

NGSS.MS-LS1-7

In the mouth, carbohydrates (starch) are digested by ........................................ into partially digested carbohydrates (maltose).

Select the organs where no chemical digestion takes place.

• mouth

• oesophagus

• stomach

• small intestine

• large intesting

In the stomach, only the nutrient ................................. is digested by proteases.

Tags

NGSS.MS-LS1-7