Metabolism Review

In order for our bodies to exercise, our cells need to get....

• molecules from food

• molecules from the air

• molecules from food and air

• molecules from drinking water

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The job of the digestive system is to:

• Break food down into small enough molecules so that cells can use them.

• Provide oxygen molecules that can be used by cells.

• Transport resources (oxygen, glucose, amino acids) throughout the body to the cells.

• Identify different problems in the body that might stop cells from receiving the necessary resources.

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NGSS.MS-LS1-3

The job of the respiratory system is to:

• Break food down into small enough molecules so that cells can use them.

• Provide oxygen molecules that can be used by cells.

• Transport resources (oxygen, glucose, amino acids) throughout the body to the cells.

• Identify different problems in the body that might stop cells from receiving the necessary resources.

The job of the circulatory system is to:

• Break food down into small enough molecules so that cells can use them.

• Provide oxygen molecules that can be used by cells.

• Transport resources (oxygen, glucose, amino acids) throughout the body to the cells.

• Identify different problems in the body that might stop cells from receiving the necessary resources.

If a person is breathing normally, which of the following could prevent him from using his body to exercise normally?

• not getting enough sunlight, because cells need sunlight to function

• not getting enough sleep, because the body only makes energy for exercise while asleep

• not eating enough food, because cells need molecules from both food and air to work

• nothing, because he would be able to exercise normally as long as his cells are getting molecules from the air

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NGSS.MS-LS1-3

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Raoul ate a meal of oats before seeing his doctor. Oats are made of mostly starch molecules. Raoul feels tired, so his doctor gave him a test and found that Raoul’s cells contained glucose molecules, but they did not contain enough oxygen molecules. Does this explain why Raoul feels tired?

• No, something else must be wrong because his cells have all the molecules they need.

• Yes, his digestive system is breaking down starch molecules, but his respiratory system may not be working properly.

• Yes, his respiratory system is working, but his digestive system is not getting energy from combining glucose molecules.

• Yes, his digestive system is working, but his respiratory system is not breaking down oxygen, so his body stopped making energy.

Tags

NGSS.MS-LS1-3

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Doctors tested a patient to find out what molecules were in his cells. His cells contained normal levels of glucose molecules and amino acid molecules, and low levels of oxygen molecules. Will this patient be able to exercise normally?

• Yes, his body is working properly enough to exercise.

• No, his digestive system is not breaking down food molecules; his cells need starch molecules to react with glucose, which releases energy.

• No, his body systems are working, but he needs to eat different food; only proteins can react with glucose to release energy.

• No, his respiratory system is not working; his cells need oxygen to react with glucose, which releases energy.

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NGSS.MS-LS1-3

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What do we call the body's use of molecules for energy and growth?

• glucose

• metabolism

• energy

• microbiome

Tags

NGSS.MS-LS1-7

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Which molecule do organisms get from the air?

• glucose

• amino acids

• carbon dioxide

• oxygen

Tags

NGSS.MS-LS1-6

Which body system breaks down food and absorbs food molecules?

• digestive

• respiratory

• endocrine

• circulatory