Cell Membranes are Said to Be ________ Because They Allow

Question

Cell membranes are said to be ________ because they allow some substances to pass but not others.
A) impermeable
B) doubly amphipathic
C) hydrophilic
D) selectively permeable
E) hydrophobic

Accepted Answer

The term "selectively permeable" is used to describe cell membranes because they allow certain molecules or ions to pass through but not others. The membrane is selectively permeable based on the size, charge, and polarity of the molecules or ions that are trying to cross. This property is essential for maintaining the internal environment of the cell and regulating the exchange of molecules between the cell and its surroundings.