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Answer :
Final answer:
High concentrations increase membrane permeability but permeability of a membrane is also influenced by its properties, such as lipid composition and presence of transport proteins, hence the correct answer is b. High concentrations increase membrane permeability.
Explanation:
While concentration gradients can influence the rate of diffusion across a membrane, higher concentrations create a steeper gradient, enhancing the driving force for molecules to move across the membrane. This increased driving force can indeed result in higher permeability, as more molecules move through the membrane per unit time.
It's crucial to note that concentration alone doesn't directly affect permeability. Instead, membrane permeability is primarily determined by factors such as membrane composition, structure, and the presence of transport proteins. Therefore, in the context of diffusion, option b 'High concentrations increase membrane permeability' accurately reflects how concentration affects membrane permeability by highlighting the relationship between concentration gradients and the movement of molecules across membranes.
Complete question -
How does concentration affect membrane permeability?
Select one:
a. Low concentrations increase membrane permeability.
b. High concentrations increase membrane permeability.
c. Concentration has no effect on membrane permeability.
d. None of the above.
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