Question

phospholipids make up ______, which keep the bad stuff out & the good stuff in. hair follicles cell membranes rewatch

Explanation:

Phospholipids are a major component of cell membranes, which act as a selective - barrier to control the movement of substances in and out of the cell. Hair follicles are structures related to hair growth and not made up of phospholipids for this function.

Answer:

B. cell membranes