Homeostasis and Cell transport

What do phosolipids contain?

They have a polar head (hydrophilic-loves water) and nonpolar tail (hydrophobic-hates water)

Selectively permeable

A barrier that alllows some substances to pass through while keeping others out.

What is the selectively permeable barrier made out of

mostly lipids and proteins

Peripheral Proteins 

On the inner or outer surface of thre membrane

Integral Proteins 

Proteins that are embedded in the membrane or span in the thickness of the membrane 

What do integral proteins do?

Can form channels or allow molecules to pass through to find them 

Fluid Mosaic Model

membrane behaves more like a fluid, not a solid

solute

what is being dissolved

solvent

the substance the solute is dissolved in

Vary in concentration 

The amount of solute in a fixed amount of solvent 

The more the solute, the…

greater the concentration 

What happens when no more solute can be dissolved?

The solution becomes saturated

What is a Aqueous solution?

When water is the solvent

What are some examples of a Aqueous solution?

sea water, Gatorade, and cytosol

What is a polar compound?

O side has a slight negative charge and the H end has a slight positive charge.

What does the polar compound do? 

makes water a very effective solvent 

What is hydrogen bonding?

What is high specific heat? 

The energy needed to break the hydrogen bonds between water molecules beforee the molecular movement can increase and raise the temperature

What is high specific heat important for?

homeostasis to keep the cells at an even temperature

What is cohesion?

attractive force between particles of the same kind.

What is adhesion?

attractive force between unlike substances

What is capillarity?

The ability of water to move upward through a narrow tube against the force of gravity