End of unit questions: respiration

Respiration is a chemical reaction that happens inside cells. complete the word equation for respiration.

glucose + ...................... → carbon dioxide + ........................

• nitrogen, energy

• oxygen and water

• water and oxygen

respiration is described as ‘aerobic’. Why>

• it involves aerobic exercise

• it takes place in the absence of oxygen

• it produces carbon dioxide

• it takes place in the presence of oxygen

Choose the correct statement.

• Every living cell respires

• Only animal cells respire

• The way in which plant cells respire is called photosynthesis

Choose the correct statement

• Expired (breathed out) air is carbon dioxide.

• Expired air contains more carbon dioxide than inspired (breathed in) air.

• Expired air contains more oxygen than inspired air.

Choose the correct statement.

• Respiration means moving your muscles to draw air into the lungs.

• Respiration means the diffusion of gases between the air sacs and the blood.

• Respiration means the release of energy from glucose, inside cells.