B4.5 Breathing and gas exchange

The main ORGAN responsible for breathing is:

• the Brain

• the Lungs

• the Liver

• the Kidneys

What are the tiny air-sacs where gas exchange takes place?

• Lungs

• Alveoli

• Bronchus

• Broncioli

The way gases move between the capillaries and alveoli is called...?

• Osmosis

• Diffusion

• Atmosphere

• Pressure

What is the muscle under the lungs called?

• Intercostal

• Diaphragm

• Bronchus

• Cardiac

When you breathe the diaphragm _______    ____ creating more space for more air.

• raises high
• raises low
• lifts high
• flattens out

Where the exchange of gases actually occur?

• Bronchi

• Trachea

• Oxygen

• Alveoli

What is the process called when you breath in the air?

• inhalation

• exhalation

What is the process called when you breath out the air?

• inhalation

• exhalation

Which of the following show the air passage for inhalation?

• lungs --> nose --> trachea

• nose --> trachea --> lungs

• nose --> lungs --> trachea

• trachea --> lungs --> nose

Breathing is the same as respiration.

• True

• False