the skin also contains a deeper layer known as the dermis. the epidermis and dermis have unique features and characteristics. sort each characteristic with its appropriate layer of the skin.

Molecules like glucose and amino acids are not lipid soluble, so cannot cross the cell membrane by simple diffusion. instead, they are shuttled across by carrier proteins in the membrane from high to low concentration. does this process require energy from the cell? this is an example of what type of molecular movement?