Would a substance that decreases membrane permeability to sodium increase or decrease the probability of generating a nerve impulse?

The correct statement is this: A substance that decreases the membrane's permeability to sodium will DECREASE the probability of generating a nerve impulse.

Action potential (nerve impulse) is generated by voltage gated ion channels that are located in the plasma membrane of cells. Action potential occurs when a neuron sends information through an axon. As the nerve impulse travels down the axon, changes in polarity occur across the membrane of the axon. These changes make the sodium and potassium ion channels to open and close as the membrane move up to its threshold potential. At the start of the action potential, depolarization occurs as the sodium ions moves into the axon while repolarization occurs as the potassium ions move out of the axon. Any substance that brings about reduction in cell membrane permeability to sodium ions will reduce the probability of generating an action potential

interphase   is the cell cycle stage in which the cell acquires nutrients, creates and uses proteins and other molecules and starts the process of cell division by replicating the dna. it is the longest stage in the eukaryote cell cycle.

the following   can go wrong during interphase:   a base pair could be mismatched during the duplication process causing a mutation.   correct answer: c

explanation:

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: