National 5 Biology Unit 2 Absorption of materials

What are the gas exchange organs?

• Lungs

• Heart

• Kidney

• Brain

What feature of the lungs provides a large surface area?

• small number of alveoli

• small number of villi

• large number of alveoli

• large number of villi

What is the function of Y?

• absorbs fatty acids and glycerol

• absorbs fatty acids and glucose

• absorbs amino acids and glucose

• absorbs amino acids and glycerol

What is the function of the villi in the small intestine?

• Absorbs oxygen from food

• Removes carbon dioxide from the bloodstream

• removes oxygen from the bloodstream

• absorb nutrients from food

What do tissues contain that allows the exchange of materials at a cellular level?

• capillary networks

• large number of villi

• lacteal

• large number of alveoli

What feature of the alveoli provides a large surface area for absorption?

• Small number

• Extensive blood supply

• Thin walled

• Large number

Name A

• Network of capillaries

• Lacteal

Why must oxygen and nutrients from food be absorbed into the bloodstream?

• To be delivered to the cells for photosynthesis

• To be delivered to the cells for respiration

• To be delivered to the cells for diffusion

• To be delivered to the cells for osmosis

What is a waste material that should be removed from cells?

• Glucose

• Oxygen

• Amino acids

• Carbon dioxide

What part of the villus absorbs glucose and amino acids?

• lacteal

• network of capillaries