What is the length of spinal cord?
Correct answer: C. 40-50 cm
- A. 10-20 cm
- B. 20-30 cm
- C. 40-50 cm
- D. 60-90 cm
Explanation
The spinal cord is about 18 inches (45 centimetres) in length and is relatively cylindrical. The cervical (neck) and lumbar (lower back) segments house the spinal cord's two areas of enlargement. A fibrous band called the filum terminal begins at the tip of the conus medullaris and extends to the pelvis.
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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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