Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
Aquaporins
|
specialized membrane proteins (faster movement than osmosis)
|
|
Transpiration
|
process of capillary action up plants from roots
|
|
Direction of Materials through Vascular Tissues
|
xylem goes up
phloem goes both ways |
|
Endodermis
|
layer of cells surrounded by casperian strip
gives cells control of what enters |
|
turgor pressure
|
pressure that a liquid exerts on its container
|
|
stomata
|
Open & close because of turgor pressure of guard cells
let CO2 enter for photosynthesis |
|
When are stomata open or close?
|
When water is abundant, it enters guard cells via osmosis, which increases turgor pressure & opens stomata
When water is scarce, it leaves guard cells, which decreases turgor pressure & closes stomata |
|
C4 plants
|
have enzymes with high affinities for CO2
gather CO2 from leaf surface even when stomata are closed |
|
CAM plants
|
stomata only open at night
CO2 is “banked” for use during the day |
|
Carbohydrate Transfer
|
Phloem is bidirectional – food moved up and down the plant
Within tubes, food is transported in water via turgor pressure (transport does not require energy) Energy (ATP) is required to move food into phloem or out of the phloem |