Active Transport Flashcards
(6 cards)
What is Active Transport?
Active transport is the movement of particles against a concentration gradient (i.e. from an area of lower concentration to an area of higher concentration) using energy released during respiration.
The process of active transport requires energy from the cell. What is the term for this?
It is an Active Process.
Where does active transport always take place? What does it require?
Active transport always takes place across a membrane, and it requires special proteins that sit in the membrane and transfer the molecule from one side to the other.
Where does the energy for active transport come from?
Respiration
This is a process that happens mainly in the mitochondria, when they break down glucose to release energy.
This process is responsible for all the energy that the cell uses. This energy is stored in little molecules called ATP. They take the energy from the mitochondria to the different parts of the cell that need it.
How do root hair cells use active transport?
Root hair cells use active transport to absorb mineral ions, and are adapted for that role by having a large surface area and lots of mitochondria.
Plants get minerals from the soil (lower mineral concentration) to their root hair cells (higher mineral concentration).
How does the digestive system use active transport?
It’s used in the digestive system when there is a low concentration of nutrients in the gut, but a high concentration of nutrients in the blood.
