Which Statement Best Characterizes the Contrasts Between Axon Guidance in the Developing

question 30

Multiple Choice

Which statement best characterizes the contrasts between axon guidance in the developing spinal cord and retina?

• A) Ephrins serve as the primary repulsive cue in both tissues.
• B) Axon guidance toward the floor plate relies primarily on substrate-bound axon guidance molecules.
• C) Axon guidance in the retina is very specific, whereas it is relatively indiscriminate in the spinal cord.
• D) Growth toward both the floor plate and retina involve repulsion.

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Definitions:

Neural Plate

The early embryonic structure that develops into the central nervous system, including the brain and spinal cord.

Central Nervous System

The part of the nervous system consisting of the brain and spinal cord, controlling most functions of the body and mind.

Embryonic Structure

An anatomical part or system that is in the early stages of development within an embryo.

Parietal Lobe

A region of the cerebral cortex that processes sensory information such as taste, temperature, and touch.