What is the definition of active transport?
Active transport is the movement of molecules across a membrane, from a region of lower concentration to a region of higher concentration.
This requires energy (in the form of ATP) from respiration.
Answer in your head, out loud, or on paper, then tap the card to flip.
What do we mean by ‘against the concentration gradient’?
Movement from lower concentration to higher concentration.
Answer in your head, out loud, or on paper, then tap the card to flip.
How do plant root hair cells use active transport?
Root hair cells use active transport to absorb mineral ions (such as magnesium and nitrate ions) from the soil.
Answer in your head, out loud, or on paper, then tap the card to flip.
Does active transport require energy?
Yes, active transport requires energy.
Answer in your head, out loud, or on paper, then tap the card to flip.
Which sub-cellular structure (organelle) provides the energy required for active transport?
Mitochondria provide the energy required for active transport.
Answer in your head, out loud, or on paper, then tap the card to flip.
In humans, glucose is absorbed into the bloodstream from the gut. How are diffusion and active transport involved in this process?
At first, the glucose is absorbed by diffusion, because there is a higher concentration in the small intestine than in the bloodstream.
However, once most of the glucose has been absorbed, there will be a higher concentration in the bloodstream and so the remaining glucose will have to be absorbed by active transport.
Answer in your head, out loud, or on paper, then tap the card to flip.
In the above diagram, which direction of movement would require active transport?
From right to left would require active transport, as it requires movement of the particles against their concentration gradient.
Answer in your head, out loud, or on paper, then tap the card to flip.