2.3 energy & waste

Question 1

The amount of energy in food is measured in calories

Answer 1

calorie

Question 2

the amount of energy it takes to raise the temperature of 1 kg of water by 1 OC.

Answer 2

calorie

Question 3

releases the energy from the processed food

Answer 3

your digestive system

Question 4

the part of food used by the body to grow and survive

Answer 4

nutrients

Question 5

5 examples of nurtrients

Answer 5

protens, fats, carbohydrates, vitamins, and minerals

Question 6

the mechanical and chemical breakdown of food into small particles and molecules that your body can absorb and use.

Answer 6

digestion

Question 7

the 4 steps of digestion

Answer 7

ingestion, digestion, absorption, and elimination

Question 8

when you chew, mash, and grind food with your teeth and tongue.

Answer 8

mechanical digestion

Question 9

Break down pieces of food into small molecules

Answer 9

chemical digestion

Question 10

when you put food, such as bread, into your mouth.

Answer 10

ingestion

Question 11

an enzyme, in your mouth, that helps break down carbohydrates.

Answer 11

saliva

Question 12

a muscular tube that connects the mouth to the stomach

Answer 12

esophagus

Question 13

food moves through the esophagus and the rest of the digestive tract by waves of muscle contractions.

Answer 13

peristalsis

Question 14

a large, hollow organ that stores food

Answer 14

stomach

Question 15

An adult stomach can hold about 2 liters of food and liquid.

Answer 15

2 liters

Question 16

enable the stomach to expand and hold large amounts of food

Answer 16

the folds on the inner walls

Question 17

the cells in these folds produce chemicals that break down proteins

Answer 17

proteins

Question 18

this

Question 19

st