Studies utilizing rats demonstrate that opioid receptors and endogenous opioid peptides appear ery early in the CNS deelopment (2).
Studies utilizing rats demonstrate that opioid receptors and endogenous opioid peptides appear ery early in the CNS deelopment (2).
通过大鼠的研究表明，阿片受体和内源性阿片肽在CNS形成过程中出现很早[2]。