MCAT Question of the Day
    •

    Q:

    		 In the ear, sound is conveyed through the transfer of vibrational energy into the production of action potentials within specialized neuronal cells called hair cells. These cells are surrounded in a fluid called endolymph. Endolymph, unlike other bodily fluids, contains extremely high concentrations of potassium ions (K+). During excitation from vibrations, potassium flows into hair cells. Which of the following holds true regarding this phenomenon?
    		 

    A

    		 Hyperpolarization of the hair cells occurs, resulting in excitation of the cells

    B

    		 Sodium acts as the depolarizing agent for hair cells

    C

    		 Membrane potential of the hair cells drops upon stimulation

    D

    		 Hair cells become depolarized from the influx of potassium



    Nervous System | Sensory Processing |
    Subscribe


    Is Your Score Stuck?

    We can teach you how to crush the MCAT!

    Learn More