Exchange surfaces

. In animals, uptake of materials is quicker if there is a rich network of…

• Capillaries

• villi

• alveoli

• nephrons

Diffusion is faster across an exchange surface if the concentration gradient is…

• less

• increased

• the same

• moved

Gas exchange surfaces are usually very

• thin

• thick

• wide

• tall

All exchange surfaces are involved in the…

• removal of wastes

• uptake of nutrients

• gas exchange

• The transfer of materials across a membrane

During gaseous exchanges, which two gases are involved?

• Oxygen & hydrogen

• Nitrogen & oxygen

• Carbon dioxide & oxygen

• Ammonia & oxygen

Alveoli are found in the…

• gills

• lungs

• large intestine

• small intestine

These are found in large numbers in the lining of the small intestine.

• Alveoli

• Ville

• Villi

• Arteries

The location for gas and nutrient exchange respectively is…

• Alveoli & capillaries

• Capillaries & alveoli

• Villi & alveoli

• Alveoli & villi

Identify the best definition for diffusion.

• The movement of a substance from an area of high concentration to an area of low concentration.

• The movement of a substance from an area of low concentration to an area of high concentration.

• The movement of a substance across a membrane.

• The movement of water across a membrane.

Mechanical movement to inhale and exhale air

• Gas Exchange
• Respiration
• Breathing
• Transport