B1. Respiration (Part 2)

Percentage of nitrogen, oxygen, carbon dioxide in inhaled air is ...

• 21%, 78%, 0.04%

• 78%, 21%, 0.04%

• 78%, 0.04%, 21%

• 0.04%, 21%, 78%

Percentage of nitrogen, oxygen, carbon dioxide in exhaled air is ...

• 14%, 78%, 4.4%

• 78%, 4.4%, 14%

• 78%, 14%, 4.4%

• 4.4%, 14%, 78%

Carbon dioxide turns limewater from colorless to ...

• no change

• red

• blue

• milky

What happens when you breathe in?

• The intercostal muscles contract, the muscles in the diaphragm relax

• The intercostal muscles contract, the muscles in the diaphragm contract

• The intercostal muscles relax, the muscles in the diaphragm contract

• The intercostal muscles relax, the muscles in the diaphragm relax

What happens when you breathe out?

• The intercostal muscles contract, the muscles in the diaphragm relax

• The intercostal muscles contract, the muscles in the diaphragm contract

• The intercostal muscles relax, the muscles in the diaphragm contract

• The intercostal muscles relax, the muscles in the diaphragm relax

The cells use the ........... to get the energy that they need

• fats

• starch

• protein

• glucose

... in cells release energy from glucose, so the cells can use energy

• Chloroplast

• Mitochondria

• Nucleus

• Cell membrane

Mitochondria carry out a chemical reaction called ..............................

• photosynthesis

• aerobic respiration

• breathing

• making food

What is the word equation of aerobic respiration?

• glucose + oxygen → carbon dioxide + water

• glucose + oxygen → carbon dioxide + energy

• carbon dioxide + water → glucose + oxygen

• carbon dioxide + water → sugar + oxygen

What is similar between breathing and respiration?

• They take place all the time

• They take place everywhere in body

• They only take place in animals

• They only take place in plants