Metabolism Critical Juncture

Front

Two teams of scientists hiked 10 kilometers to different study sites. Before their hike, the Valley team ate a lunch of mostly protein. The Mountain team ate a lunch of a mix of starch and protein, but hiked at high altitude, where there is much less oxygen. Which team probably had an easier time hiking?

Back

Neither team had an easy time hiking; the Valley team’s cells needed more glucose from broken-down starch for a reaction, and the Mountain team’s cells needed more oxygen from air.

Front

The test report above shows the level of molecules in different parts of the patient's body. What does this test indicate about how her body systems are working?

Back

Her body systems are working properly.

Front

What could happen if Rico's breathing gear broke during a dive and he could not breathe as much air as usual?

Back

It would be difficult to swim, because his cells cannot work without molecules from air.

Front

Will this patient be able to exercise normally?

Back

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

Front

Does Raoul's test results explain why he feels tired?

Back

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

Front

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

Back

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

Front

A patient has been eating healthy foods, but his digestive system is not doing what it usually does. Can this patient still exercise normally?

Back

No, molecules from food are not getting broken down small enough to get inside his cells.

Front

The tables above show information about the body systems of three different patients. Which of these patients’ bodies are NOT working well enough to exercise normally?

Back

R. Frost and A. Kim

Front

An ocean scientist plans to spend several days underwater in a submarine. Doctors on land will monitor her body to make sure she is healthy during her trip. What is one way doctors will be able to tell whether her body is healthy enough to do all her tasks while she is in the submarine?

Back

The doctors could see if her cells are getting the molecules they need from food and air.

Front

Will this patient be able to exercise normally given that her cells contained normal levels of amino acids, normal levels of oxygen molecules, and low levels of glucose molecules?

Back

No, her cells need glucose to react with oxygen to release energy.