Spinal cord terminates at the level of:
Correct answer: D. L1 or L2 vertebra
- A. Sacrum
- B. Coccyx
- C. Dorsal root
- D. L1 or L2 vertebra
Explanation
Option D is correct.The spinal cord terminates at the level of the L1 or L2 vertebra in adults. This is because the spinal cord does not grow as fast as the vertebral column during development. As a result, the spinal cord ends up being shorter than the vertebral column. The end of the spinal cord is called the conus medullaris. The conus medullaris is a cone-shaped structure that is made up of gray matter. The gray matter of the conus medullaris contains nerve cells that control the lower extremities.
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About Coordination and Control
Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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