Some cases of sudden infant death syndrome (sids) may include biological vulnerabilities in the function of which neurotransmitter?

The correct answer is serotonin.

Explanation:

SIDS or sudden infant death syndrome refers to an inexplicable death, generally at the time of sleep, of a seemingly healthy baby of less than a 1-year-old. SIDS is also called crib death as the infants usually die in their cribs.  

In children who are diagnosed with SIDS, usually possess lesser concentrations of serotonin that assist in monitoring heart rates, breathing, and sleeping. Serotonin refers to a compound, which is found in blood platelets that constricts the blood vessels. At the same time, it also functions as a neurotransmitter. It is a chemical found in the brain, which transmits messages to other cells.  

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