Gaseous Exchange

The function of alveoli is to .....

• Transfer oxygen to the muscles

• Block dirt from entering the bloodstream

• exchange gases with the bloodstream

• remove unwanted blood cells from the body

Which gases are exchanged?

• Oxygen and nitrogen

• Oxygen and carbon monoxide

• Carbon dioxide and nitrogen

• Oxygen and carbon dioxide

How are these gases exchanged?

• Dissolving

• Diffusion

• Osmosis

• Mitosis

Diffusion takes place up the gradient (low to high concentration)

• TRUE

• FALSE

Alveoli have a ____________ surface area to aid diffusion

• Large

• small

What properties of the alveoli membranes also enhance diffusion?

• Moist and thick

• Dry and thin

• Dry and thick

• Moist and thin

The blood supply to the alveoli is.....

• Large

• Small

• inconsistent

• in gas form

What part of the respiratory system is between the bronchi and the alveoli?

• Trachea

• Larynx

• Bronchioles

• Lungs

Which muscle contracts to allow the body to take in more oxygen?

• Abdominals

• Latissimus dorsi

• Pectorals

• Diaphragm

Without more oxygen entering your blood, your body cannot create any more.....?

• Glucose

• Energy

• Heat

• Lactic acid