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;
9 Cards in this Set
- Front
- Back
Apoplast Pathway
|
Water and mineral ions travel across the cortex through the cell walls.
Reach the casparian strip and move into the symplast via osmosis to reach the xylem |
|
Symplast Pathway
|
Water and mineral ions travel across the cortex through the cell's cytoplasm via the plasmodesmata, then reaches the xylem.
|
|
Companion Cells
|
Provide the sieve tube with ATP
|
|
Xerophytes
|
Plants adapted to dry conditions eg. cacti
- thick cuticle on leaves - prevents water loss - rolled leaf - stomata sunk in pits - humid air maintained around stomata. |
|
Red blood cells adaptations for oxygen transport
|
- Biconcave - increase SA
- Contains haemoglobin - No nucleus - more space for Hb |
|
Cardiac Cycle
|
Electrical waves come from the SAN in the wall of the right atrium. They are then transferred to the AVN which sends signals down the bundle of His and to the Purkyne fibres which cause the ventricles to contract simultaneously from the bottom up.
|
|
Vein
|
Carry deoxygenated blood to heart - thin walls - low pressure.
Have valves to prevent backflow. |
|
Capillary
|
One cell thick - short diffusion pathway
|
|
Artery
|
Thick muscular walls - carry oxygenated blood from the heart and so have to with stand the high pressure.
|