Why does the spinal cord have the right number of axons to innervate all the muscle cells?A. Each muscle cell sends a chemical message telling the spinal cord to make a neuron.B. The genes cause a certain number of neurons to form and the same number of muscles to form.C. Immature cells divide, with one daughter cell becoming a neuron and the other becoming a muscle.D. The spinal cord makes an excess of neurons, but those that fail to innervate a muscle die.

Ciccarelli: Psychology_5 (5th Edition)
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ISBN:9780134477961
Author:Saundra K. Ciccarelli, J. Noland White
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Chapter1: The Science Of Psychology
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Why does the spinal cord have the right number of axons to innervate all the muscle cells?
A. Each muscle cell sends a chemical message telling the spinal cord to make a neuron.
B. The genes cause a certain number of neurons to form and the same number of muscles to form.
C. Immature cells divide, with one daughter cell becoming a neuron and the other becoming a muscle.
D. The spinal cord makes an excess of neurons, but those that fail to innervate a muscle die.

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