7.4 Metabolic Reactions Pre-Assessment

What does the conservation of atoms in reactions imply?

• Atoms are created in a chemical reaction.

• Atoms are destroyed in a chemical reaction.

• Atoms are neither created nor destroyed in a chemical reaction.

• Atoms change into energy in a chemical reaction.

How can the mass of products in a reaction be explained?

• The mass of products is greater than the mass of reactants.

• The mass of products is less than the mass of reactants.

• The mass of products equals the mass of reactants.

• The mass of products is unrelated to the mass of reactants.

What evidence can be used to argue that the body is made up of systems?

• The body is made up of a single system.

• The body systems do not interact.

• The body is made up of systems like the digestive or circulatory systems that work together.

• The body systems are independent and do not form larger systems.

How do groups of cells contribute to the body's structure?

• Cells form tissues and organs that are part of larger systems.

• Cells function independently without forming tissues.

• Cells only form tissues, not organs.

• Cells do not interact with each other.

How do chemical reactions in the body affect energy?

• They release energy or help the body grow.

• They consume energy without any release.

• They have no effect on energy.

• They only store energy.

What is the role of matter and energy in the body as food is digested?

• Matter and energy remain constant without movement.

• Matter and energy move through the body as food is digested and used.

• Matter and energy are only stored, not used.

• Matter and energy are unrelated to digestion.

Why does mass stay the same before and after a chemical reaction, even though the substances change?

• Mass is created during the reaction.

• Mass is destroyed during the reaction.

• Mass is conserved during the reaction.

• Mass is irrelevant to the reaction.

How do different systems in the human body work together to keep us alive and healthy?

• By functioning independently without interaction.

• By working together and interacting with each other.

• By competing against each other for resources.

• By shutting down when not needed.

What happens to the food we eat once it enters our bodies?

• It remains unchanged.

• It is immediately expelled.

• It is broken down and absorbed.

• It turns into water.

How do chemical reactions in the body help us grow and get energy?

• By storing energy indefinitely.

• By breaking down molecules to release energy.

• By stopping energy production.

• By creating energy from nothing.