Active Transport CELL STRUCTURE AND TRANSPORT

Question 1

What is active transport?

Answer 1

Sometimes the substances needed by a cell have to be moved against a concentration gradient, across a partially permeable membrane. This is called active transport.

Question 2

What does active transport allow?

Answer 2

For substances to move from an area of low concentration to an eaten of high concentration, against the concentration gradient.

Question 3

What is needed for active transport to take place?

Answer 3

Energy. This is produced by cells during respiration.

Question 4

What cells are involved in active transport?

Answer 4

Root hair cells.

Cells in the lining of your gut.

Question 5

Give examples of active transport?

Answer 5

Glucose is absorbed out of your gut and kidney tubes and into your blood.

Mineral ions in soil (nitrate ions) are usually found in dilute solutions. These solutions are more dilute than the solution within plant root cells. This allows plants to absorb mineral ions, even though it is against a concentration gradient.