Worksheets1.2 Gas exchange [Must Do]
Total questions: 12
Worksheet time: 10mins
Gas exchange is needed to supply (a) to cells and removed (b) from the blood.
The air sacs that are covered with capillaries where gas exchange takes place is .................
Bronchi
Trachea
Oxygen
Alveoli
The SMALLEST blood vessels that allow for gas exchange are called?
Bronchi
Trachea
Bronchioles
Capillaries
What is the adaptations of alveolar structure
Thin wall of alveolus and blood capillary
Moist wall of alveolus
Large surface area of alveolus
Alveolus covered by network of capillary
The adaptations of alveolar ....
Increase efficiency
Maximise exchange of gas
Decrease efficiency
Minimise exchange of gas
Which of the following are features of the alveoli that adapt them to gas exchange?
I. High surface area
II. Thin walls
III. Dry surfaces
I and II only
I only
II and III
I, II, and III
What adaptations does the alveoli have for efficient gas exchange?
thick walls
thin walls
small surface area
What is found around alveoli?
capillaries
pleura
lymphatic nodes
saliva
During gas exchange what enters from alveoli to the capillaries?
CO2
CO
O2
nitrogen
The air inside the alveolus contains a lot of oxygen and only a small amount of (a) . So, the (b) can easily (c) through the thin wall of alveolus into the (d) .
The blood inside the capillary comes from the heart contains only a small amount of oxygen and a lot of (a) , so it diffuses into the (b) in the alveolus.
