Transport Mechanism Flashcards
What is the act of molecules moving from a high concentration gradient to a low one?
Diffusion
Transport that relies solely on diffusion.
Passive Transport
Transports without added energy.
Passive Transport
Types of Diffusion
Simple
Osmosis
Facilitated
Diffusion that only relies on concentration.
Simple Diffusion
Diffusion with solvent movement, usually water.
Osmosis
Water molecules can go through a semi-permeable membrane as they are ___.
So small.
In other cases, osmosis can also be facilitated by proteins called?
Aquaporins
What do Aquaporins do?
More efficient and faster transport.
A review:
The dissolved substance in a solution.
Solute
A review:
The dissolving medium in a solution.
Solvent
If Simple Diffusion focuses on solute transport between gradients, Osmosis is?
Solvent Transport (Usually Water)
Osmosis involves the solvent (usually water) going from a ___ solvent concentration to a ___ solvent concentration.
High solvent concentration to a low solvent concentration.
If the solution has more solute outside, it is called a?
Hypertonic Solution
If the solution has more solute inside, it is called a?
Hypotonic Solution
What happens if the solution is hypertonic?
The cell will shrink.
What happens if the solution is hypotonic?
The cell will burst.
Analogy for Remembrance
Hyper soln is to
as with
Hypo soln is to
Hyper, meaning more tired, use of energy, meaning the cell will eventually shrink.
Hypo, well fuck, it’s hard to make one. Just remember the other one.
An equilibrium is reached between both solvent and solute.
Isotonic Solution
Supplementary Example
Since the roots are hypertonic, the soil is ___?
Hypotonic
*This is important since the roots have more solute, water is sucked in.