IC 3 - Lessons 4 & 5 Quiz

Describe what you think happens to protein molecules when you digest them.

• Proteins are broken down into subunits called amino acids.

• Protein molecules are broken down into glucose.

• The protein molecules that we eat go directly to our muscles to build them up.
• Proteins are broken down into lipids.

Do you think that food molecules are the only source of energy for the body?

• No. You can get energy from sleeping.
• No. You can get energy from caffeine.
• Yes. Food is the only thing that contains chemical energy that the body can convert into other types of energy to do things.
• Yes. Food is the only source of energy for our body since it has kinetic energy.

What evidence do you have that food molecules have energy? Choose all that apply.

• We eat food.
• Burning other food such as oil, potato chips, and marshmallows is evidence.
• The Calories on food labels are evidence.
• We eat protein and it is broken down into amino acids.

If you go on a diet and restrict your food intake to particular foods, where does your body get the energy to keep functioning?

• The energy only comes from the little food that you eat.
• The energy comes from the protein that is in our body.
• The energy comes from stored fat to provide energy.
• The body starts to break down cells that were meant to replace bone cells, skin cells, and muscle cells.

In the next year you grow 2 inches and gain 6 pounds. Where did the body get the energy for you to grow and gain weight?

• The energy comes from the water you drink.
• The energy comes from sleeping every night.
• The energy came from the food you ate.
• The energy comes from the oxygen that you breathe.

Explain why your body is always using energy, but you do not need to be eating all the time.

• I eat when I need more food.
• I store food in my body when I eat. My body uses this stored food later on to give me the energy to do things when I am not eating.
• My body gets the food it needs from my blood.
• It takes time for food to digest so there is always some available to provide us energy.

When do humans store fat molecules in their bodies?

• Humans store fat molecules every time they eat anything that contains calories.
• Humans store fat molecules when they eat food with a lot of fat.
• Humans store fat molecules when they eat junk food.
• Humans store fat molecules when they eat more calories than they need.

How do children use food molecules to grow taller?

• Children grow taller when they use food molecules they eat to build large molecules that make up new cells.
• Children grow taller when they use the food molecules they eat to make up new cells without changing the food molecules.
• Children grow taller when they use the energy from the food molecules, but all of the molecules leave the body as waste.
• Children grow taller when they store food molecules as fat.

What is the same about carbohydrates, proteins, and fats? (Use the model below)

• Carbohydrates, proteins, and fats all have carbon, hydrogen, and oxygen atoms.
• Carbohydrates, proteins, and fats are all made of the same number and types of atoms.
• Carbohydrates, proteins, and fats all have the same arrangement and types of atoms.
• Carbohydrates, proteins, and fats can all form long chains of molecules.

What happens to the carbohydrates when you digest them?

• Carbohydrates are broken down into glucose that we use for energy.

• Carbohydrates are broken down into amino acids.

• Carbohydrates go directly to our muscles to build them up.

• Carbohydrates are broken down into lipids.