Transport Flashcards
(5 cards)
1
Q
What factors affect the rate of diffusion?
A
Concentration gradient, temperature and surface area.
2
Q
Which organs have adapted for diffusion?
A
The lungs, gills, intestines and roots in plants.
3
Q
How have organs adapted for diffusion?
A
Large surface area. Thin membranes to provide short diffusion pathway. Efficient blood supply in animals. Well ventilated in plants.
4
Q
What is the definition of active transport?
A
The movement of substances from low to high concentration using energy from respiration.
5
Q
Why is active transport necessary?
A
To maintain the right concentrations of molecules in cells.
