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?
1.5:1
4:1
6:1
Which organism has the highest surface area to volume ratio?
Human
Elephant
Yeast cell
What are the tiny air sacs in the lungs called?
Alveoli
Bronchi
Capillaries
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?
Nucleus
Cytoplasm
Cell membrane
Which one of these is correct for Fick's Law?
The rate of diffusion is proportional to both the surface area and concentration difference and is inversely proportional to the thickness of the membrane.
The rate of diffusion is proportional to both the surface area and thickness of the membrane and is inversely proportional to the concentration difference.
The rate of diffusion is proportional to the surface area and is inversely proportional to both the thickness of the membrane and concentration difference.