SUPERBOWL MONDAY!  Objective:  SWBAT remaster objectives from the Unit 2 test  Catalyst:  What moves during diffusion?  What happens to cells in a hypertonic solution?  What happens during active transport?

Agenda  Catalyst  REMASTERY  REMASTERY CHANCE  EXIT QUESTION

Diffusion  Diffusion is when solute moves from high to low concentration

Diffusion  Only if the membrane is permeable to the solute!  Otherwise…  OSMOSIS!

Osmosis  Osmosis is when water moves from high water concentration to low water concentration  How do you calculate water concentration??  Solute plus water=100%!

Hypertonic, Hypotonic, Isotonic  Hypertonic= more water inside!  Hypotonic= less water inside!  Isotonic= same water inside and out!

Hyper, Hypo, Iso? 72% Sugar Solution 34% Sugar Solution

55% solute 85% solute

Hypertonic Solution Outside Cell Inside Cell 70% water 50% water

Hypotonic Solution Outside Cell Inside Cell 22% water 40% water

Isotonic Solution Inside Cell Outside Cell 90% water

What happens in each situation?  Water moves from high to low

Hypertonic Solution Water Inside Cell Outside Cell 60% water

Water Hypotonic Solution Outside Cell Inside Cell 22% water 40% water

What happens in each situation?  Hypertonic- corn syrup- cell gets smaller  Hypotonic- distilled water- cell gets bigger (bursts)  Isotonic- cell stays the same size

Active Transport  Instead of moving towards equilibrium, cell moves away from equilibrium…  TAKES ENERGY! (ATP)

Why is this active transport?

If solutes are moving from L  R

Got it?  Remastery Quiz time!  Then… HUMAN BODY VIDEO!!!

Exit Question When we have a guest speaker, what norms do you think we should follow?