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Learning Outcomes
Learning Outcomes
Define active transport and discuss its importance as an energy-consuming process by which substances are transported against a concentration gradient, as in ion uptake by root hairs and uptake of glucose by cells in the villi.
🕜Estimated Time: 40 mins
Movement of Substances
Movement of Substances
Movement of substances into and out of cell occur through a variety of methods, including
Diffusion
Osmosis
Active transport
Movement of substances can either be
Passive (without expenditure of energy)
Active (requires expenditure of energy)
In this unit, we will be focusing more on active transport.
Active Transport
Active Transport
Active transport is the process in which energy is used to move the particles of substances against a concentration gradient, from a region of lower concentration to a region of higher concentration.
Only occur in living cells because only living cells respire
Processes that require active transport
Absorption of mineral salts by root hair cells
Absorption of glucose and amino acids in the small intestine of humans
Watch the video below to consolidate your understanding of active transport. Take note of how active transport can also take place across the cell membrane, which will aid in your understanding in PU1 Cellular Transport.
Biology Resources Main Page
Test Your Understanding!
Test Your Understanding!
Fill out the form below to test your understanding on the topic of Cellular Transport. Remember to click 'View responses' to see the correct answers.
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