Final answer:
The first type of membrane other than selectively permeable is non-permeable membranes.
Step-by-step explanation:
Aside from selectively permeable membranes, there is another type called a non-permeable membrane. Non-permeable membranes do not allow any molecules or ions to pass through them. They create a complete barrier between the two sides of the membrane, preventing the movement of substances.
For example, the membrane surrounding a nucleus in a cell is non-permeable. It protects the DNA and other important components of the nucleus by not allowing any molecules or ions to freely cross the membrane. To enter or exit the nucleus, specific transport mechanisms are needed.
In summary, non-permeable membranes are a type of membrane that do not allow any molecules or ions to pass through them. These membranes create a barrier between different sides of the membrane, providing protection to specific areas within cells. Examples of non-permeable membranes include the nuclear membrane in cells.