Respiratory system and respiration

When you breathe, your lungs take in ___ and remove ___. 

• air/oxygen
• oxygen/carbon dioxide 
• carbon dioxide/waste 
• waste/air 

The air sacs that are covered with capillaries where gas exchange takes place

• bronchi
• lungs
• oxygen
• alveoli

What is the main function of the respiratory system?

• to provide oxygen and remove carbon dioxide from the body
• to bring oxygen to the body
• to break down food and absorb nutrients
• to remove oxygen from the body and deliver carbon dioxide

Which is not a job of the respiratory system?

• taking in oxygen

• taking in carbon dioxide

• moisten air

• transport glucose

Which one accurately describes the difference between breathing and cell respiration?

• breathing produces energy while cell respiration produces carbon dioxide

• cell respiration produces energy, while breathing is brings air in and out of lungs

• breathing occurs in cells while cell respiration occurs in the lungs

• none of the above

Which sequence correctly indicates the branching pattern of the human respiratory system?

• trachea -> bronchi -> bronchioles -> alveoli

• trachea -> bronchioles -> bronchi -> alveoli

• alveoli -> trachea -> bronchioles -> bronchi

• alveoli -> bronchioles -> trachea -> bronchi

Which diagram best illustrates the function of an alveolus?

• 
• 
• 
• 

What happens to cause air to be exhaled from the lungs?

• The rib muscles contract and move outward.
• The chest cavity expands and grows larger.
• The lungs contract and then expand.
• The diaphragm relaxes and moves upward.

This organelle is the _____________, where respiration occurs.

• chloroplast

• Golgi bodies

• nucleus

• mitochondrion

The composition of the oxygen in inhaled air is

• 21%

• 16%

• 4%

• 0.04%