A chemical messenger is, at least, a "double agent". it attracts some species and repels others . 化学信使至少是一种“双作用体”。它引诱一些昆虫,忌避另一些昆虫。
Molecules called neurotransmitters are chemical messengers 被称为神经递质的分子是化学信使。
A chemical messenger is , at least , a " double agent " . it attracts some species and repels others 化学信使至少是一种“双作用体” 。它引诱一些昆虫,忌避另一些昆虫。
Neurotransmitters are the brains chemical messengers , and specific neurotransmitters help to regulate mood 神经传递素是大脑中的化学信使,特定神经传递素帮助调节情绪。
Chemical messengers such as epinephrine exert their effects by interacting with specialized receptors on the surface of target cells 像肾上腺素一类的化学信使,靠著与目标细胞表面的特殊受体结合,以产生作用。
The passing on of informationfrom neuron to neuron does not , they show , occur exclusively at thesynapses , i . e . the junctions between the nerve cell extensions 相反,看起来似乎是神经元通过整个神经细胞胞突释放其化学信使,并且利用这种方法激活周围细胞。