Which of the following best describes the resting membrane potential (RMP)?
A)The intracellular environment is negatively charged.
B)The intracellular environment has more positively charged sodium.
C)The extracellular environment is negatively charged.
D)It has a voltage of about +75 mV.
E)It is dependent upon the absorption of potassium ions by the muscle fiber.

Question

Quizplus · Accepted Answer

The resting membrane potential (RMP) refers to the electrical charge difference between the intracellular and extracellular environments of a cell at rest. The intracellular environment is negatively charged due to the presence of intracellular proteins and negatively charged ions such as chloride (Cl-) and organic ions. This negative charge is balanced by the presence of positively charged ions such as potassium (K+) and sodium (Na+) in the extracellular environment. Thus, choice A best describes the RMP.

Which of the Following Best Describes the Resting Membrane Potential