The Plasma Membrane and Membrane Potential - Overview of MembraneTransport
4 important questions on The Plasma Membrane and Membrane Potential - Overview of MembraneTransport
In relation to the plasma membrane, what is mean when a substance is permable/impermeable to the plasma membrane? What is selectively permeable?
substance
if a substance cannot pass, the membrane is impermeable to it.
The plasma membrane is selectively permeable meaning it permits some particles to pass through while excluding others.
What are the 2 properties that determine a molecules permeability?
2. the size of the particle.
List if O2, CO2, Fatty acids, Na+, K +, Polar molecules (glucose, proteins) can pass the plasma membrane passively and if not why?
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Name the 2 forces that move molecules across the membrane and define them?
(2) active forces, which do require the cell to expend energy (ATP) in transporting a substance across the membrane.
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