PROTEIN!!!!!!!!!!!!!!!!!!!!!!!!!
Membrane transporter.
PROTEIN!!!!!!!!!!!!!!!!!!!!!!!!!
membrane proteins act as carriers or channels for the specific movement of various substances in to and out of the cells.
PROTEIN!!!!!!!!!!!!!!!!!!!!!!!!!
proteins
proteins
What you are considering when you are referring to how easily materials can pass through a membrane is how permeable the cell wall or membrane is.
PROTEIN!!!!!!!!!!!!!!!!!!!!!!!!!
Through proteins in the membrane.
The membrane
It is called semi-permeability, a series of biochemical structures and processes that Control The Ingress and Egress of bio-materials into and out of The Cell.
The cells go through the cell's membrane