For an organism to function, substances must move into and out of cells. Three processes contribute to this movement – diffusion, osmosis and active transport.
What happens during gas exchange in the lungs?
Oxygen passes into the blood and carbon dioxide passes out of the blood
Oxygen passes out of the blood and carbon dioxide passes into the blood
Oxygen and carbon dioxide pass into the blood
A cube has sides with a length of 4 cm. What is its surface area to volume ratio?
Which organism has the highest surface area to volume ratio?
What are the tiny air sacs in the lungs called?
Which features do exchange surfaces have?
Small surface area and short diffusion distance
Large surface area and large diffusion distance
Large surface area and short diffusion distance
What is diffusion?
The movement of particles from an area of higher concentration to an area of lower concentration.
The movement of particles from an area of lower concentration to an area of higher concentration.
The movement of water molecules from an area of lower concentration to an area of higher concentration.
How are leaves adapted for effective gas exchange?
They contain a good blood supply
They have a large surface area
They absorb light
What is ventilation?
The movement of air into the lungs
The movement of air into and out of the lungs
The movement of air out of the lungs
Which of these is the exchange surface for a single cell?
How is the trachea adapted for its function?
It has rings of cartilage to keep it open
It is lined with muscles for peristalsis
It has a large surface area