Professor Kendell Is Explaining How Neurons Work

question 15

Multiple Choice

Professor Kendell is explaining how neurons work.He uses the metaphor of an electrical cord to explain neuron structure.Like the wires inside the electrical cord,he says,the ___________ carries the neuron's electrical message;like the rubber protecting the cord's wires,the neuron's _____________ ensures that the signal goes where it's supposed to.

• A) axon;myelin sheath
• B) neurotransmitter;soma
• C) dendrite;axon terminal
• D) node of Ranvier;myelin sheath

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Definitions:

Light

Electromagnetic radiation within a certain portion of the electromagnetic spectrum, perceived by the human eye as brightness of varying wavelengths and colors.

Cornea

The transparent front part of the eye that covers the iris, pupil, and anterior chamber, contributing to the eye's ability to focus light.

Lens

A curved piece of glass or other transparent materials used to refract light, focus images, and aid vision or in photography.

Feature Detectors

Neurons in the brain that respond only to specific visual patterns (for example, to lines or angles).