6.4- Gas exchange in the leaf of a plant

?
  • Created by: Megan2413
  • Created on: 05-02-17 12:01
What is the equation for photosynthesis?
Carbon dioxide + water --> glucose + oxygen
1 of 17
What is the equation for respiration?
Glucose + oxygen --> carbon dioxide + water
2 of 17
Which process requires energy- photosynthesis or respiration?
Photosynthesis
3 of 17
Why do plants overall release oxygen during the day?
They make more oxygen than is used in respiration
4 of 17
What gas do plants take in during the day?
Carbon dioxide
5 of 17
What is the only process that occurs at night and why?
Respiration because for photosynthesis sunlight is necessary
6 of 17
Therefore what gas exchange occurs at night?
Plants taken in oxygen and give out carbon dioxide
7 of 17
Give two ways in which leaves are adapted for photosynthesis
- They have a large surface area to volume ratio - They are thin hence shorter diffusion pathway - Air spaces in spongy mesophyl layer allow easy access for gases to photosynthesising cells - many stomata so no cell is far from a stoma reducing -->
8 of 17
-->
the diffusion pathway
9 of 17
Why is the upper epidermis transparent?
So light can pass through to the palisade layer where all the photosynthesising cells are
10 of 17
What are stomata?
Tiny pores found on the underside of leaves
11 of 17
What type of cell surrounds stomata?
Guard cells
12 of 17
How can gas exchange be controlled?
The guard cells open and close
13 of 17
What other benefit is there to stomata being able to open and close?
Water loss by evaporation can be controlled
14 of 17
When guard cells are f_____ they cause stomata to close
Flaccid
15 of 17
When guard cells are t_____ they cause stomata to open
Turgid
16 of 17
What two organelles help maintain a diffusion gradient?
- Mitochondria carrying out respiration - Chloroplasts carrying out photosynthesis
17 of 17

Other cards in this set

Card 2

Front

What is the equation for respiration?

Back

Glucose + oxygen --> carbon dioxide + water

Card 3

Front

Which process requires energy- photosynthesis or respiration?

Back

Preview of the front of card 3

Card 4

Front

Why do plants overall release oxygen during the day?

Back

Preview of the front of card 4

Card 5

Front

What gas do plants take in during the day?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Exchange resources »