Aframe is 45in. by 32in how many square feet in the area of this frame?

Hope this answer will be a good help for you.

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.