5 Questions
Which substances generally have a greater concentration inside the cell than outside the cell?
CO2, K+
Which substances generally have a greater concentration outside the cell than inside the cell?
O2, Na+, Ca2+, H+
What determines whether a solute diffuses into or out of the cell?
The concentration gradient
What are the two major categories of diffusion based on the movement of substances across the plasma membrane?
Simple diffusion and facilitated diffusion
What determines whether a substance moves across the plasma membrane unassisted or assisted by a protein?
The chemical characteristics of the substance
Test your knowledge on cell membrane and diffusion with this quiz. Learn about substances that have greater concentration inside or outside the cell and how the concentration gradient affects solute diffusion.
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