Vocabulary
What is Metabolism?
The set of chemical reactions in cells that release energy
Which molecule do we breathe in that cells need for metabolism?
Oxygen
Which body system brings oxygen into the body?
Respiratory System
What do cells use energy for?
Growth, repair, movement, and maintaining life.
What evidence shows that metabolism happens in cells?
Energy is released and waste products are produced.
What word means a chemical process that happens inside cells?
Chemical reaction
What large food molecule is broken down into glucose?
Starch (or carbohydrates)
Which system moves oxygen and nutrients to cells?
Circulatory System
Where does the energy used by cells come from?
Food (glucose)
Why do we need both food and oxygen for metabolism?
Food provides energy; oxygen helps release it.
What do we call the smallest working unit of a living organism?
Cell
Proteins are broken down into what smaller molecules?
Amino Acids
Which system breaks food into smaller molecules?
Digestive system
What happens to glucose during metabolism?
It is broken down to release energy.
How does increased activity affect metabolism?
Metabolism increases to release more energy.
What molecule is known as the main energy source for cells?
Glucose
Which molecule is released as waste when cells use oxygen?
Carbon dioxide
Which system removes waste gases from the body?
Respiratory System
Why is oxygen important for releasing energy from glucose?
Oxygen helps release energy from glucose.
What evidence shows that matter is conserved during metabolism?
Atoms are rearranged but not created or destroyed.
What are substances called that speed up chemical reactions in cells?
Enzymes
Why must food molecules be broken down before cells can use them?
Cells can only use small molecules for chemical reactions.
How do body systems work together to support metabolism?
Systems work together to deliver food and oxygen to cells and remove waste.
What would happen to cells if metabolism stopped?
Cells would not have energy and would stop functioning.
How can a model help explain metabolism in the human body?
Models show how molecules move and interact in the body.