Question

question 12: the is the difference in charge between the intracellular and extracellular space of a neuron. options: intracellular fluid, extracellular fluid, resting potential, membrane potential. question 13: is a neurotransmitter with roles in pleasure and pain modulation. options: beta - endorphin, acetylcholine, norepinephrine, gaba.

Explanation:

For Question 12, the membrane potential is defined as the difference in charge between the intracellular and extracellular space of a neuron. For Question 13, beta - endorphin is a neurotransmitter involved in pleasure and pain modulation.

Answer:

Question 12: membrane potential
Question 13: beta - endorphin