Active Transport

This lesson covers:

  1. What 'active transport' is
  2. How active transport is used by root hair cells to absorb minerals 
Diagram showing active transport with molecules moving from low to high concentration across a membrane.

Active transport is the movement of molecules across a membrane, from a region of concentration to a region of concentration. This requires from respiration.

lower
higher
energy

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Is active transport a passive or active process?

Passive

Active

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True or false? Active transport can only take place across a membrane.

True

False

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Which process provides the energy required for active transport?

Photosynthesis

Respiration

Translocation

Homeostasis

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Illustration of a plant with roots showing where mineral ions are absorbed.

Where do plants absorb mineral ions from?

Air

Bacteria 

Soil

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Why can't plants absorb mineral ions by diffusion?

Mineral ions are charged

Their concentration is higher in the cell than in the soil

Mineral ions are too large

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Illustration of different plant cells adapted to absorb mineral ions.

Which cells in the plant are adapted to absorb mineral ions?

Palisade mesophyll cells

Root hair cells

Xylem cells

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Other than mineral ions, which other molecule do root hair cells absorb? 

Water

Carbon dioxide

Oxygen

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