A+P lab prequiz 3

active transport

• requires energy from ATP to move substances across membrane

• low to high concentration

passive transport

• pass through plasma membrane without requiring energy

• high to low concentration

diffusion

• movement of substance from high to low concentration

• passive

osmosis

• diffusion if water ONLY

• water moves through plasma membrane

• high to low concentration

simple diffusion

• substances can DIRECTLY penetrate plasma membrane

• small, uncharged molecules(O2+CO2)

channel mediated diffusion

• passage for CHARGED molecules and ions

osmosis diffusion

• diffusion if water ONLY

• water moves through plasma membrane

• high to low concentration

hypotonic

less solutes compared to cell

hypertonic

more solutes compared to cell

isotonic

same solutes compared to cell

what would happen if a RBC was placed into a hypotonic solution?

• water would move in from area of high concentration to low (from outside in)

• it would swell and possibly explode, which is a condition called hemolysis

what would happen if a RBC was placed into a hypertonic solution?

• water would move out from area of high concentration to low (from inside out

• the cell would shrink, which is a condition called crenation

what would happen if a RBC was placed into a isotonic solution?

• water will move in and out at the same rate

• the cell shape will not change

What are you trying to discover in the investigating factors affecting diffusion of molecules in agar experiment?

if dyes that are larger in molecular size move faster in the agar or would smaller molecules

What are you trying to discover in the diffusion of molecules through dialysis sacs experiment?

-how does the size of a molecule affect its ability to pass through the dialysis sac pores
-would a molecule pass through the sac that is larger than the pore size? smaller in size?
-Which would pass through the pore more quickly, an intermediate size molecule smaller than the pore size or a very small molecule

What are you trying to discover in the animal membrane bag experiment?

-How does the concentration of solutes (dissolved particles) affect the rate of water movement?
-In which case would water enter a solution in an animal membrane bag more quickly, one with a higher concentration of solutes or a lower concentrations of solutions?

What are you trying to discover in the egg osmosis experiment?

-When this de-shelled egg is placed in a hypotonic solution, would water move in or out of the egg?
-When placed in hypertonic solution?
-An isotonic solution?