semipermeable
A filter or a gatekeeper can be a structure that allows only certain things to pass through. These structures help control and regulate what is permitted to enter or proceed.
The cell membrane allows only certain things to pass in and out of the cell.
The structure is important because each enzyme's shapes allows only certain reactants to bind the enzyme.
The cell membrane allows only certain things to pass in and out of the cell.
The cell's membrane allows only certain substances to diffuse in and out of the cell.
A town allows only residential buildings in a certain area.
The cell membrane. It is a semi-permeable membrane (or selectively permeable membrane) - this means that it only lets certain certain molecules or ions pass in or out of the cell. Permeability may depend on the molecule's size, solubility, properties, or chemistry.
Decision structure.
Death and taxes.
The cell membrane.
import quotas
The cell part that allows only certain substances to diffuse into and out of the cell is called the semi permeable membrane. This allows good substances to enter the cell.