Gas Exchange In The Leaf Of A Plant Flashcards
Do plants respire?
Yes
What is one key difference in the gas exchange between plants and animals?
Plants photosynthesise and during photosynthesis oxygen is produced and carbon dioxide is taken in.
What is an advantage of plants photosynthesising and respiring?
At times the gas is produced in one process that can be used for another. This therefore reduces gas exchange with the external air.
What changes in the plant leaf?
The volumes and types of gases that are being exchanged.
What does the volumes and types of gas in the plant lead depend upon?
The balance between the rates of photosynthesis and respiration.
Where does most of the carbon dioxide come from when photosynthesis is occurring?
Some carbon dioxide comes from the respiration of cells however, most of it is obtained from the external air.
When photosynthesis is occurring, where does some of the oxygen come from for respiration?
Some oxygen from photosynthesis is used in respiration but most of it diffuses out of the plant.
When does photosynthesis not occur?
In the dark.
When does the oxygen have to diffuse in the leaf from the external air?
When photosynthesis is not occurring.
When photosynthesis is not occurring, where does the carbon dioxide that is produced during respiration go?
It diffuses out of the cell.
What are the two ways in which gas exchange in plants is similar to that of insects?
No living cell is far from the external air, and therefore a source of oxygen and carbon dioxide.
Diffusion takes place in the gas phase (air), which makes it more rapid than if it were in water.
What is the diffusion pathway in plants like?
It is short and fast.
What do they asked spaces inside a leaf have?
A very large surface area compared with the volume of living tissue.
Is there a specific transport system for gases implants?
There is no specific transport system for gases, which simply move in and through the plant by diffusion.
Where does most gaseous exchange occur?
In the leaves.
