In Terms of Plasma Membrane Transport,which Descriptor is the Most

Question

In terms of plasma membrane transport,which descriptor is the most accurate?
A)​permeable
B)selectively permeable
C)non-permeable
D)porous
E)​sealed

Accepted Answer

The plasma membrane is not permeable to all substances, so option A (permeable) and option C (non-permeable) are not accurate. Option D (porous) is also not accurate because the plasma membrane is not full of holes. Option E (sealed) is also not accurate because the plasma membrane does allow some substances to pass through. The most accurate descriptor is selectively permeable, as the plasma membrane allows only certain molecules to pass through based on their size, charge, and other factors.