Cell Membrane and Transport Diagram | Quizlet

Homeostasis of a cell is maintained by

the plasma membrane (cell membrane), controls what goes in and out

The cell membrane acts as

a barrier between the cell and the outside environment

The cell membrane controls the

movement of material in and out of the cell

Describe the Bilayer of phospholipid are arranged

lipid tails are between phosphate heads creating a barrier

Transport proteins

aid in moving larger molecules in and out of the cell examples: ions, sugar , water

Cholesterol

add strength to the cell membrane, lipid molecules located in the bilayer that makes cell membranes more rigid

Selectively permeable

the property of the cell membrane that allows it to regulate what goes in and what goes out of the cell, usually based on size and charge of the substance

Diffusion (no energy required)

when substances move from an area of higher concentration to an area of lower concentration

Facilitated diffusion (no energy required)

when larger substances are moved across the cell membrane from high to low concentrations with the help of carrier proteins (glucose sugars)

Osmosis (no energy required)

movement of water molecules through a selectively-permeable membrane from an area of greater water concentration to an area of lower water concentration