What is the meaning of selectively permeable?

Some molecules can pass, some are blocked.

All harmful molecules are blocked.

Molecules can pass, but objects are blocked.

All molecules are blocked except water.

Question

What is the meaning of selectively permeable?

Some molecules can pass, some are blocked.

All harmful molecules are blocked.

Molecules can pass, but objects are blocked.

All molecules are blocked except water.

umm · Answer

Definition of Selectively Permeable Membranes. All cells are enclosed with a cell membrane. A selectively permeable cell membrane is one that allows certain molecules or ions to pass through it by means of active or passive transport.