The nature of a nerve impulse is primarily a/an _____________ event; communication between neurons is primarily a/an_____________
Correct answer: D. electrical; chemical
- A. chemical; electrical
- B. acetylcholine, catecholamine
- C. dendrite; axon
- D. electrical; chemical
Explanation
The nerve impulse travelling within a neuron is primarily electrical, whereas communication across the synaptic gap is usually chemical through neurotransmitters. This distinction explains why the correct sequence is electrical, then chemical.
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