White matter in nervous system is made of;
Correct answer: B. Myelinated axons
- A. Dendrites
- B. Myelinated axons
- C. Cell bodies
- D. Unmyelinated axons
Explanation
White matter in the nervous system is primarily composed of myelinated axons, which are long projections of neurons covered with a fatty substance called myelin. Myelin acts as an insulating layer, increasing the speed and efficiency of nerve signal transmission. Therefore, option B is selected.
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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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