alleryThe message in nervous coordination travels as:
Aa hormone carried in the blood plasma
Ba mineral ion diffusing through tissue
Can electrical impulse along a neurone
Da protein carried by a red blood cell
Answer & Solution
Correct answer: C. an electrical impulse along a neurone
1. The two systems differ in the nature of the message they send.
2. Nervous coordination transmits an electrical impulse along the membrane of a neurone.
3. At a synapse the impulse is briefly carried by a chemical transmitter, then becomes electrical again.
4. Endocrine coordination is the system that uses a chemical, the hormone, carried in blood plasma.
5. Red blood cells carry oxygen, not coordinating signals.
_Source: NECTA ACSEE 2023 Biology 133/1, Question 7: Coordination_
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