A base , any number greater than 7 is a base .
Answer:
Biological membranes consist of a double sheet (known as a bilayer) of lipid molecules. This structure is generally referred to as the phospholipid bilayer. In addition to the various types of lipids that occur in biological membranes, membrane proteins and sugars are also key components of the structure.
Explanation:
It’s a facilitated diffusion!
Facilitated diffusion= high to low concentration= has a protein channel