Why does you consider cell membrane as a semi- permeable?

Answer 1

The cell membrane controls what enters and exits the cell so therefore it allows some stuff in like glucose and water. While it doesn't let in other stuff like viruses or bacteria.

Answer 2

The cell membrane is considered semi-permeable because it allows certain molecules or ions to pass through while restricting the passage of others. It is selectively permeable because it has specific proteins and channels that regulate the entry and exit of substances in and out of the cell. This property is essential for maintaining cell homeostasis and proper function.