Question

the cell membrane, also known as the plasma membrane, separates the inside of the cell from the outside environment. it is a semipermeable barrier.
the latin prefix semi - means half, and permeable means having pores or openings that substances can pass through.
what is the significance of a semipermeable cell membrane?
the cell membrane does not allow any substances to enter or leave the cell.
the cell membrane only allows certain substances to enter or leave the cell.
the cell membrane allows all substances to enter or leave the cell.

Explanation:

The cell membrane is semi - permeable. The prefix "semi -" means half, and "permeable" means having pores or openings. So, a semi - permeable membrane is not completely closed (not allowing any substances, which would be impermeable) and not completely open (allowing all substances, which would be fully permeable). It allows only certain substances to pass through based on size, charge, and other properties. This is crucial for maintaining the cell's internal environment, regulating the entry of nutrients and the exit of waste products, and protecting the cell from harmful substances in the external environment.

Answer:

The cell membrane only allows certain substances to enter or leave the cell.