N5 2.7 Absorption of Materials

Select the 3 features that surfaces involved in the absorption of materials have from the list below:

(a)   (b)   (c)  

• Good blood supply
• Large surface area
• Thin walls
• Thick walls

• Poor blood supply

• Small surface area
• Produce lots of energy
• Produce little energy

Tissues contain ​networks of​ (a)   to allow the exchange of materials at cellular level.

• veins
• arteries
• capillaries

Select which substances need to be absorbed by body cells for the process of respiration.

(a)   (b)  

• oxygen
• glucose
• carbon dioxide

• waste

• water

In the lungs, which structure is used for gas exchange?

What name is given to the structures in the lungs that are used in gas exchange?

The gas ​ (a)   passes from the alveoli into the blood and the gas ​ (b)   passes from the blood into the alveoli.

• oxygen
• carbon dioxide

Which feature of the lungs increases the surface area available for the exchange of gases?

• having a good blood supply

• having lots of alveoli

• having thin walls

Which feature of alveoli increase the efficiency of gas exchange?

• having a good blood supply

• having a lacteal

• having a round shape

What is the name of the process by which oxygen moves through the walls of the alveoli into the blood?

(a)  

• diffusion
• osmosis

• active transport

• respiration

From the diagram what is gas A?

• Carbon dioxide

• Oxygen