Assertion: serotonin | /r/HasProperty | synthesized in the brain
Facets:
value: from scratch
type: MANNER
Source sentences:
text: But since serotonin can’t cross the blood-brain barrier, it has to be synthesized in the brain from scratch.
text: In addition, the serotonergic system is under tight biological regulation, therefore, an increase in the synaptic levels of serotonin should cause a decrease in the amount of serotonin synthesized in the brain.