Question

What process assures that the spinal cord has the right number of axons to innervate all the muscle cells?

   What process assures that the spinal cord has the right number of axons to innervate all the muscle cells?

Biological Psychology

Biological Psychology

James W. Kalat 12th Edition

Chapter 4, Problem 17

Instant Answer

Solved by Expert Samia Islam

10/09/2020

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During embryonic development, motor neurons in the spinal cord extend their axons towards the target muscles. Show more…

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What process assures that the spinal cord has the right number of axons to innervate all the muscle cells?

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Key Concepts

Programmed Cell Death (Apoptosis)

Programmed cell death is an essential developmental process in which excess cells are systematically eliminated to ensure proper tissue and organ formation. During the development of the nervous system, apoptosis removes surplus neurons that fail to form the correct connections, thus ensuring that only the properly connected cells survive.

Target-Derived Trophic Support

This concept refers to the mechanism by which target tissues, such as muscle cells, provide survival signals or growth factors to innervating neurons. Neurons that successfully establish connections receive these crucial signals, while those that do not are eliminated, fine-tuning the neuronal population in the developing spinal cord.

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