Body Systems
The respiratory system is made of these parts.
Mouth, trachea, lungs
The molecule we breathe in.
Oxygen
A student thinks the body is only working properly when cells are getting molecules from food and molecules from air. Is this student correct?
Yes, the body only works when cells are getting molecules from BOTH air and food.
Rosa eats a peanut butter sandwich. What molecules are found in the bread and peanut butter?
Protein and starch
Digestive System
The molecule we get from eating foods like fish, meat, and eggs.
Protein
Doctors tested a patient and found that his cells contained normal amounts of oxygen and glucose but no starch. Will this patient be able to exercise normally?
Rosa eats a peanut butter sandwich. What does she need from the food she eats and the air she breaths to make energy?
Some problems with the digestive system make it very difficult for the body to digest enough food. Why would it be harder to exercise when you have a digestion problem like this?
Your body would have molecules from air (oxygen) but not enough molecules from food (glucose) to make enough energy.
The molecule we get from eating foods with starch like corn, bread, and potatoes.
Glucose
What foods can an athlete eat a lot of for extra energy?
Glucose (starchy foods like corn, potatoes, and bread)
Rosa easts a peanut butter sandwich. Explain how the body systems work together to get molecules to her cells.
Respiratory - breath in oxygen
Digestive - breaks down food into glucose and amino acids
Circulatory - red blood cells take molecules to the rest of her body
A patient has been eating healthy foods but her respiratory system is not working as well as it usually does. Can this patient still exercise normally?
No her cells do not have enough oxygen to react with glucose to make energy.
What molecules are needed for cellular respiration?
Glucose and oxygen
The result of cellular respiration.
Amino acids form proteins to repair and make new cells. Oxygen and glucose react to make energy.
Jamal ate a meal of rice before seeing his doctor. Rice is made mostly of starch molecules. Jamal has been feeling tired a lot so his doctor gave him a test that found that Jamal's cells contained normal oxygen levels but low levels of glucose. Does this explain why he is feeling tired?
Yes, his respiratory system is working but his digestive system is not breaking down starch into glucose for his cells.
What is needed for cell growth and cell repair?
Protein and Energy
Some types of syrup are almost entirely made of glucose molecules. If a person ate some syrup like this, what would happen to her ability to exercise?
It would be easier because glucose is already a molecule the body needs and it would move through the body faster than other food molecules.
What body systems could a doctor test to make sure our bodies are getting molecules it needs?
Circulatory - all molecules
Respiratory - Oxygen
Digestive - glucose and amino acids