The cell membrane, this is because of the lipids that form it. They allow certain things through such as water during osmosis but block other things creating a need for things like protein pumps.
The plasma membrane.
Such a membrane is said to be selectively permeable or semi-permeable.
semi permeable membrane is semi-permeable or not completely permeable...it allows particles of a certain shap or size flow through but other shapes that are large or snaller cant fit through.
a semi permeable membrane
Cell membrane is elastic and transparent. It can be impermeable, permeable, semi-permeable or selectively permeable. In humans the plasma membrane is selectively permeable that is it allows entry to certain substance.
A semi-permeable membrane is a membrane which allows cells to pass through it. The cells which make up the membrane of the inside of the cheek of the human mouth, for example, are semi-permeable. This allows things, like nicotine for example, to be absorbed through the membrane walls while the walls maintain structural integrity.
A semi-permeable membrane, permeable to gases and small, non-charged particles.
A semi-permeable membrane, permeable to gases and small, non-charged particles.
It means that is/can be a door to a cell 'hence semi permeable membrane? (or to anything)
plasma
A semi permeable plasmodial membrane
Cell membranes are semi-permeable, meaning they allow certain substances to pass through while blocking others. This selectivity is facilitated by proteins embedded in the membrane that regulate the passage of specific molecules based on size, charge, and other properties.