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The important neurotransmitter released by neurons that allows impulses to pass across a synapse is named which of the following?
AHaemoglobin
BInsulin
CAcetylcholine
DAdrenaline
Answer & Solution
Correct answer: C. Acetylcholine
1. A neurotransmitter must be a synaptic signalling chemical.
2. Haemoglobin is a blood pigment, so option A is wrong.
3. Insulin is a hormone from the pancreas, not a synaptic transmitter, ruling out option B.
4. The neurotransmitter named in the text is acetylcholine, option C.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 15 Nervous System "Neurotransmitters", p.228_
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