Metabolic Reactions Review

What two substances do your cells need for energy?

• Oxygen and Food

• Oxygen and Water

• Sleep and Air

• Methane and Hydrogen Sulfide

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T/F: Your heart and lungs work harder during exercise because your body is trying to get more oxygen to all the cells of the body to replenish energy.

• True

• False

Why does your body have a heart?

• It acts as a pump so that blood can get to every part of the body

• It controls the actions of the rest of your body

• It creates blood

• It is the "brain" of all of your bones

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Your digestive system breaks down food and helps turn it into energy. But how do those food molecules get delivered to every cell in the body?

• By the respiratory system

• By the circulatory system

• By teleporation

• By pooping

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Why do we have fat tissue attached to our bodies?

• Because it helps us move easier

• Because our bodies can burn it to use as a "back-up" energy source

• Because fat tissue creates blood for our body

• Because whenever we burn fat, it give our body oxygen

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Why is blood so important for energy?

• Has the brain, spinal cord and nerves in it

• It has oxygen and food molecules in it, which is delivered to every cell in the body

• It looks really cool

• It allows us to sleep

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This system transports oxygen and food to all of the body's cells!

• Digestive system

• Respiratory system

• Nervous system

• Circulatory system

When we burn fat, the fat molecules react with oxygen. We then breathe out:

• Carbon Dioxide and Water

• Oxygen and Methane

• Fire

• Smoke

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Your circulatory system:

• transports oxygen and food molecules to every cell in the body

• transports pharynx cells to every muscle cell

• includes the brain, spinal cord, and nerves

• is important for protecting the body

Our saliva contains an enzyme called ______ that breaks down starch and turns it into glucose.

• Fat

• Amylase

• DNA

• Alveoli

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