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某些胃肠激素、胰腺激素以及脑内的激素可调制动物的摄食行为。最近发现,在下丘脑有一种胰多肽类似物——神经肽Y(NPY),可能在动物的摄食活动中起一定的调制作用。Clark等用大鼠进行了这方面的观察。它们发现向饱食大鼠的第三脑室注入2～10μg的人胰多肽(hPP)和NPY,可使动物白昼进食总量明显增加,而且NPY比hPP更有效。它可在注射后诱导所有的大鼠进食,其摄食量比注射hPP多2倍、潜伏期短,而进食时间更长。实验中还观察到NPY和hPP在给动物第二次注射后,对于增加动物单位时
Certain gastrointestinal hormones, pancreatic hormones, and hormones in the brain modulate animal feeding behavior. Recently, it has been found that there is a pancreatic polypeptide analog neuropeptide Y (NPY) in the hypothalamus, which may play a role in the modulation of feeding activity in animals. Clark and other rats in this regard were observed. They found that injecting 2 to 10 μg of human pancreatic polypeptide (hPP) and NPY into the third ventricle of rats that saturate rats significantly increased the total daytime intake of animals and that NPY was more effective than hPP. It induces all rats to eat after injection, which consumes 2 times more hPP, has a shorter incubation period, and takes longer to eat. Also observed in the experiment NPY and hPP after the second injection to animals, animal units for the increase