Cell Membrane
How many layers is the cell membrane?
2
Osmosis is the movement of what?
Water
As we saw in our cell size lab, cells need to have a lot of ___________ _______ so nutrients can get in.
surface area
How do the heads of phospholipids feel about water?
Love it!
If there are equal amounts of solute inside the cell as there are outside the cell, what kind of solution would it be?
isotonic
Phospholipids are made out of what main component?
fat
Water moves towards where there is more what?
salt
What kind of solution was the corn syrup egg in?
hypertonic
Water moves in/out of cells so that it maintains what?
homeostasis
A cell (30% solute) in super salty water (60% solute) would be considered what kind of solution?
hypertonic
What is the cell membrane made of? (2 main things)
phospholipids and proteins
Molecules move from an area of _______ to ________ concentration.
High to Low
What was the evidence that proved the gummy bear was in a hypotonic environment?
Increase in mass
Why are phospholipid tails pointing inward in the cell membrane?
They hate water
A long, skinny cell was designed. Its surface area was 70 cm^2, and its volume was 10 cm^3. What is the ratio, and would it be a successful cell?
7:1 and yes
What is the official name of the cell membrane?
Phospholipid Bilayer
Osmosis is a type of ___________
diffusion
A successful isotonic solution in the gummy bear lab would have showed what?
no change in mass
Why is water an important topic when thinking about cells?
It surrounds and is in our cells!!!
There is such a thing as water intoxication. How would water move in relation to my cells if I consumed too much water?
Water would move into the cells
fluid mosaic model
Plants need proper turgor pressure or they will go through ____________
plasmolysis
A successful cell, according to the design of cell competition, has a fast what?
diffusion rate
What are the parts of a solution?
There is a cell (12% solute, 88% solvent) in tap water (3% solute, 97% solvent). What kind of solution is this? And how much solute would you add to make it isotonic?
Hypotonic and 9%