WorksheetsDiffusion in the lungs
Total questions: 16
Worksheet time: 9mins
Which of the following is the best description for what can be seen in the picture?
the heart and its arteries
some alveoli surrounded by capillaries
veins and arteries cut open
lungs and blood
The smallest blood vessels in the picture are
arteries
alveoli
bronchioles
capillaries
Which of the following is the best description about the blood in the capillaries close to the alveoli?
the blue blood arriving is oxygenated blood, the red blood leaving is deoxygenated blood
the red blood arriving is oxygenated blood, the blue blood leaving is deoxygenated blood
the blue blood arriving is deoxygenated blood, the red blood leaving is oxygenated blood
the blood in the capillaries is not moving
The process that happens, to cause oxygen to move from the alveoli into the capillaries is called
(a)
In this diagram showing the gases diffusing in and out of the alveolus, which gas is moving out of the inhaled air?
oxygen
carbon dioxide
nitrogen
blood
In this diagram showing the gases diffusing in and out of the alveolus, which gas is moving out of the bloodstream?
oxygen
carbon dioxide
nitrogen
blood
Oxygen gas (O2) moves into the blood capillary by
(a)
Which letter on the diagram shows an area where the concentration of oxygen would always be high?
A
B
C
D
Which letter on the diagram shows an area where the concentration of oxygen would always be lower?
A
B
C
D
Carbon dioxide gas (CO2) moves into the alveolus by
(a)
Which of the following things makes sure that the concentration of oxygen in the alveoli is always high?
Inhaled air is always coming in (with lots of O2)
The blood in the capillaries is always moving
The alveoli and the capillaries have very thin walls
The red blood cells are very good at carrying oxygen around the body
Which of the following things makes sure that the concentration of oxygen in the capillaries is always lower than in the alveoli?
Inhaled air is always coming in (with lots of O2)
The blood in the capillaries is always moving through
The alveoli and the capillaries have very thin walls
The red blood cells are very good at carrying oxygen around the body
Which of the following things assists the gases O2 and CO2 to diffuse quickly to where they need to go?
Inhaled air is always coming in (with lots of O2)
The blood in the capillaries is always moving through
The alveoli and the capillaries have very thin walls
The red blood cells are very good at carrying oxygen around the body
Which letter on the diagram shows an area where the concentration of carbon dioxide would always be lower?
A
B
C
D
When the oxygen has been taken away from the alveoli, the first organ it travels to is the
(a)
The heart pumps blood around the body, so that oxygen can be delivered to every cell. Cells use the oxygen for cell (a) .
