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Questions and Answers
Which type of diffusion allows water-soluble compounds and ions to cross the plasma membrane?
Which type of diffusion allows water-soluble compounds and ions to cross the plasma membrane?
- Dissolved gas diffusion
- Lipid-soluble compound diffusion
- Channel-mediated diffusion (correct)
- Simple diffusion
What is the net movement of a substance from an area of higher concentration to an area of lower concentration called?
What is the net movement of a substance from an area of higher concentration to an area of lower concentration called?
- Diffusion (correct)
- Concentration gradient
- Tonicity
- Osmotic flow
In an isotonic saline solution, what happens to the size and shape of red blood cells?
In an isotonic saline solution, what happens to the size and shape of red blood cells?
- They appear normal in size and shape (correct)
- They undergo osmotic flow
- They swell and lyse
- They crenate (shrivel)
What type of solution has a lower solute concentration than the cell?
What type of solution has a lower solute concentration than the cell?
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What type of solution has a higher solute concentration than the cell?
What type of solution has a higher solute concentration than the cell?
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Which type of diffusion allows the passage of $O_2$ and $CO_2$ across the plasma membrane?
Which type of diffusion allows the passage of $O_2$ and $CO_2$ across the plasma membrane?
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