The myelin sheath:
Correct answer: C. Speeds up conduction
- A. Is found in all axons
- B. Is found in all dendrites
- C. Speeds up conduction
- D. Is proteinaceous
Explanation
The myelin sheath acts as an insulator for axons, allowing impulses to jump between nodes (saltatory conduction), which increases the speed of nerve impulse transmission.
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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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