Cell Membrane and Transport

Spontaneous spreading of molecules or atoms and it is an essential way in which substances move into, through, and out of cells.

Check all the factors that affect diffusion rate.

• Concentration

• Temperature

• Size

• Charge

• Pressure

Tags

NGSS.HS-PS1-5

Cell membrane exhibits selective permeability, this means that..

• allowing lower concentration of molecules to enter

• allowing some substances to cross it more easily than others

• providing means of molecule movement in phospholipid bilayer

What makes up the layer of a cell membrane?

Phospholipids are amphipathic meaning they contain HYDROPHOBIC and HYDROPHILIC regions. What does HYDROPHOBIC means?

• water fearing

• water loving

Phospholipids are amphipathic meaning they contain HYDROPHOBIC and HYDROPHILIC regions. What does HYDROPHILIC means?

• water fearing

• water loving

Phospholipids are amphipathic meaning they contain HYDROPHOBIC and HYDROPHILIC regions. What does HYDROPHILIC means?

• water fearing

• water loving

states that the membrane is a mosaic of protein molecules bobbing in a fluid of phospholipids.

When a lipid bilayer separates two fluids with different solute concentrations, water will diffuse across it

- when a fluid has a low overall solute concentration relative to another fluid.