When a Neuron Is Polarized

question 291

Multiple Choice

When a neuron is polarized:

• A) the exterior fluid surrounding the neuron is more negatively charged than the interior of the neuron.
• B) an action potential will travel down the dendrites, causing the release of neurotransmitters.
• C) the electrical charge across the neuron's membrane is balanced, with the same charge outside as inside.
• D) the interior of the neuron is more negatively charged than the exterior fluid surrounding the neuron.

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Definitions:

Solute Concentration

The measure of the amount of solute dissolved in a solvent or solution.

Kidney Medulla

The kidney medulla is the innermost part of the kidney, composed of renal pyramids, and is responsible for concentrating urine and maintaining water and salt balance in the body.

Vasa Recta

refers to the series of straight blood vessels in the kidney that serve a crucial role in the process of urine concentration.

Countercurrent Mechanism

A mechanism of exchange in which fluids flow in opposite directions, enhancing the transfer of heat or solutes, often found in biological systems like kidneys and fish gills.