The neuron's cell membrane permits some substances to pass through but not others;this is because the membrane is
A) depolarized.
B) semipermeable.
C) electrically charged.
D) covered with myelin.

Question

Quizplus · Accepted Answer

The term semipermeable means that only certain substances can pass through the membrane while others are blocked. This is the reason why substances such as ions and neurotransmitters can pass through the neuron's cell membrane, while other molecules are unable to. The other options listed (depolarized, electrically charged, and covered with myelin) are not accurate descriptions of the membrane's ability to selectively allow certain substances to pass through.

The Neuron's Cell Membrane Permits Some Substances to Pass Through