Active Transport in Plants Flashcards

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What is active transport in plants?

It is the movement of substances from a more dilute solution to a more concentrated solution, using energy from respiration.

How is active transport different from diffusion?

Diffusion goes from high to low concentration and needs no energy. Active transport goes from low to high concentration and needs energy.

Why do root hair cells use active transport?

They use active transport to pull mineral ions from the soil into the root, even when the soil has a lower concentration than the root.

What is meant by moving substances against a concentration gradient?

It means moving particles from an area where they are less concentrated to an area where they are more concentrated.

Where does the energy for active transport in plant cells come from?

The energy comes from respiration in mitochondria inside the cells.

Which type of useful particles are taken up by active transport in roots?

Mineral ions, such as nitrate ions and magnesium ions, are taken up by active transport.

Why do plants need nitrate ions, taken up by active transport?

Plants need nitrate ions to make amino acids and proteins for growth.

Why do plants need magnesium ions, taken up by active transport?

Plants need magnesium ions to make chlorophyll, which is needed for photosynthesis.

What part of the root hair cell helps control active transport?

Proteins in the cell surface membrane act as small pumps that move ions into the cell using energy.

What would happen to active transport in roots if there was very little oxygen?

Respiration would slow down, so less energy would be released and active transport would slow or stop.

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