First slide

Uptake and Transport of Mineral Nutrients

Question

Which of the following is correct regarding mineral ions absorption in plants?

Easy

A

Most of the mineral ions are absorbed passively and some mineral ions are actively absorbed.
B

Most of the mineral ions are absorbed actively and some mineral ions are passively absorbed.
C

All the mineral ions are actively absorbed.
D

All the mineral ions are passively absorbed.

Solution

Most minerals must enter the root by active absorption into the cytoplasm of epidermal cells. This needs energy in the form of ATP. The active uptake of ions is partly responsible for the water potential gradient in roots, and therefore for the uptake of water by osmosis. Some ions also move into the epidermal cells passively.

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