Why Are Action Potentials Usually Conducted in One Direction

question 56

Multiple Choice

Why are action potentials usually conducted in one direction?

• A) The nodes of Ranvier conduct potentials in one direction.
• B) The brief refractory period prevents reopening of voltage-gated Na⁺ channels.
• C) The axon hillock has a higher membrane potential than the terminals of the axon.
• D) Ions can flow along the axon in only one direction.
• E) Voltage-gated channels for both Na⁺ and K⁺ open in only one direction.

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Definitions:

Kinesthesia

The ability to sense the position and movement of one's body parts.

Dissociation

A mental process of disconnecting from one's thoughts, feelings, memories, or sense of identity, often as a response to traumatic events.

Semicircular Canals

Structures within the inner ear that are key components of the vestibular system, helping to maintain balance and spatial orientation.

Retinal Disparity

A binocular cue for perceiving depth based on the slight difference in the visual images that each eye perceives because of their different angles.