cell transport

Plasma membrane (cell membrane)

Regulates what enters and leaves the cell and separates the internal environment of the cell from the external environment

Fluid Mosaic Model

Describes the following properties of the cell membrane: 1. cell membrane is fluid, flexible and moves. 2. cell membrane is composed of proteins, lipids and carbohydrates.

Selectively permeable

The term to describe a cell membrane that allows some substances to pass, but not others

Bilayer

The cell membrane is made of two layers of lipid molecules.

Phospholipid

Makes up the cell membrane; has 1 head (hydrophilic) and 2 tails (hydrophobic)

Polar Head

part of the phospholipid that is attracted to water.

Non-Polar Tail

Part of the phospholipid that is not attracted to water.

Hydrophilic

Means "water lovings" Describes the heads (circle portion) of the phospholipids

Hydrophobic

Means water fearing. Describes the tails of the phospholipids

Marker Protein

This component of the cell membrane allows different cells in your body to identify each other.

Channel protein

This component of the cell membrane allows the transport of specific substances across a cell membrane.

Cholesterol

This component of the cell membrane provides stability and flexibility for the structure.

Extracellular fluid and cytoplasm

This region around the cell membrane contains water.