Respiratory System - Gas Exchange

Cells use oxygen in this process to generate ATP energy.

• breathing

• cellular respiration

• photosynthesis

• ventilation

What is NOT a main stage of breathing?

• internal respiration

• external respiration

• breathing

• glycolysis

Inspiration involves the movement of ___ rich air into the lungs. Expiration involves the movement of ___ rich air out of the lungs.

• O2, CO

• CO2, O2

• O2, CO2

• CO, O

Where does gas exchange occur in humans?

• Gills

• Alveoli

• Bronchioles

• Trachea

What system is responsible for transporting oxygen to all of the other body systems?

• Respiratory

• Circulatory

• Nervous

• Endocrine

During internal respiration, body cells will expel this gas since they have a high concentration of it.

• CO2

• O2

• N

• CO

This molecule is what the body uses as energy.

• Food

• ADP

• Oxygen

• ATP

Why is a moist environment crucial for respiration?

• Allows gases to become slippery

• Allows for diffusion

• Allows for our lungs to be lubricated

• It hydrates us

During internal respiration, the lungs have a high concentration of O2 atoms in them. The blood passing through the capillaries attached to the alveoli have a low concentration of O2. Why does oxygen move into the capillaries?

• Gravity

• Active Transport

• Ventilation

• Diffusion

Explain why these molecules move in this way. Try to explain this phenomenon in terms of how the molecules interact with each other.