The voltage across a membrane is called the _____.Group of answer choicesmembrane potentialosmotic potentialchemical gradientelectrochemical gradient

The voltage across a membrane is called the membrane potential.

Explanation:

Membrane potential refers to the difference in electric potential (voltage) across a biological membrane due to the distribution of ions on either side of the membrane. This potential is crucial for many physiological processes, including the transmission of nerve impulses in neurons, muscle contraction, and the regulation of ion flow through channels and pumps. It is primarily determined by the concentration gradients of various ions (like sodium, potassium, calcium, and chloride) and the permeability of the membrane to these ions. While the other terms listed, such as osmotic potential and electrochemical gradient, relate to different physiological concepts, they do not specifically describe the voltage itself. Thus, the correct answer is membrane potential.