excitatory

The responses of respiration to hypoxia is diphase,that is respiratory excitatory at first,then respiratory depression.

呼吸对缺氧反应都是双相,即先兴奋后抑制。

Leptin is one endogenous excitatory autacoid, encoded by obese gene and secreted by adipose cells.

瘦素(leptin)是肥胖基因(ob基因)编码，脂肪细胞分泌一种内源性激素，主要调控体重和脂肪分布。