Membrane & Diffusion
Define diffusion in one sentence.
Diffusion is the movement of molecules from high to low with no energy required.
This type of solution contains more water than solute.
Hypotonic
As the cell size decreases, the SA/V ratio
Increases
Define active transport in one sentence.
Active transport is the movement of molecules from low to high and it requires energy.
Hypertonic
Given four cuboidal epithelial cell heights (10 µm, 20 µm, 30 µm, 40 µm), which will have the highest SA/V ratio
The cell with height 10 um
This type of transport moves molecules against the concentration gradient.
Active transport
If red blood cells normally found in an isotonic medium are placed in distilled water, they will most likely
To smell and lyse
What is the relationship between the cell size and efficiency of nutrient and waste transport?
As the cell size decreases the cells efficiency to transport nutrients and wastes increases.
Describe the structure of the phospholipid bilayer
Hydrophilic heads that face away from each other towards the inside and outside of the cell. Hydrophobic tails that face towards each other
An experiment was performed in which a potato slice is placed in a beaker of distilled water. After 3 hours, what would be the predicted result?
It would gain mass
Prokaryote
Potassium ion pumps are apart of which type of transport?
active transport
A cellophane bag with 2M sucrose that is only permeable to water is placed in a beaker with distilled water. After 1 minute one would observe
The bag expanding because water is entering the bag
Which type of cell is less efficient at nutrient and waste transport: prokaryote or eukaryote?