Transport through Cell Membranes Flashcards
Allow some substances, but not other, to pass into or out to the cells.
Selectively Permeable
True or False
Cell’s survival does not depend on maintaining the difference between Intracellular and Extracellular material.
False
It depends on it
True or False
Waste product must enter cells continually, and nutrients must exit.
False
Nutrients must enter cells continually, and waste product must exit.
True or False
Cells are able to maintain proper intracellular concentrations of molecules because of its permeability and the ability to transport certain molecules.
True
True or False
Rupture of the membrane, alteration of its permeability characteristics, or inhibition of transport processes can disrupt the normal intracellular concentration of molecules and lead to cell death.
True
Does not require cell to expend energy
Passive Transport Process
Particles tend to distribute themselves evenly within a solution
Diffusion
Composed of two major parts, the solutes and the solvent.
Solution
Are substances dissolved in a predominant liquid or gas, which is called solvent.
Solutes
True or False
Solutes, such as ions or molecules, tend to move from an area of higher concentration of a solvent to an area of lower concentration of the same solvent in solution.
False
Solutes, such as ions or molecules, tend to move from an area of higher concentration of a solute to an area of lower concentration of the same solute in solution.
Results from the natural, constant random motion of all solutes in a solution.
Diffusion
The difference in the concentration of a solute in a solvent between two points divided by the distance between the two points.
Concentration Gradient
True or False
Steeper when the concentration difference is large and/or the distance is small.
True
