Nerve cells can send messages faster if they have:
Correct answer: D. Myelinated axon
- A. Many chromosomes
- B. Non-myelinated axons
- C. May dendrites
- D. Myelinated axon
Explanation
Myelinated axons have insulation from myelin sheaths, which increases the speed of nerve impulses. The myelin sheath facilitates saltatory conduction, where nerve impulses jump from node to node, reducing the need for continuous propagation. This allows for faster transmission of signals along the axon. Myelin also decreases capacitance and increases resistance, enhancing the efficiency of signal transmission.
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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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