Na⁺ Channels in a Membrane Open,allowing Sodium Ions to Diffuse

question 127

Multiple Choice

Na⁺ channels in a membrane open,allowing sodium ions to diffuse into a neuron.The membrane potential changes from -70 mV to -65 mV.This membrane response can best be described as

• A) equilibrium.
• B) hyperpolarization.
• C) graded depolarization.
• D) all-or-none depolarization.
• E) the generation of an action potential.

---

Definitions:

Sensory Neurons

Nerve cells that are responsible for converting external stimuli from the organism's environment into internal electrical impulses.

Synapses

The junctions between neurons through which nerve impulses pass, allowing for communication within the nervous system.

Specialized Cells

Cells that have developed unique characteristics and functions to perform specific roles within an organism.

Sense of Balance

The ability to maintain bodily equilibrium or stability through the integration of sensory information from the vestibular system, vision, and proprioception.