👉 The term "transmembrane" refers to a biological membrane that spans across the cell membrane, separating the interior of the cell from the exterior. This membrane is crucial for the movement of substances between the cell and its surrounding environment. In simple terms, it's like having two doors or windows in the cell: one on the inside (the cell itself) and another on the outside (the cell membrane). The transmembrane membrane acts as a barrier that prevents substances from entering or leaving the cell