By blocking the release of a chemical messenger in the brain, the toxin stops muscles from contracting.

这种毒素阻止大脑释放一种化学信号，从而抑制肌肉收缩。

youdao

Instead of needing to be activated by a specific chemical messenger, the engineered fat cells are always active.

它们常常处于激活状态，而不需要受特殊化学信号激活。

youdao

New research shows that the answer may lie in serotonin, a neurotransmitter, or chemical messenger produced by nerve cells.

新的研究表明，答案可能就在于羟色胺，一种神经递质，神经细胞所发送的化学邮件。

youdao

Cholinesterase inhibitors may work by protecting a chemical messenger needed for brain activities.

VOA: special.2009.09.15

Dopamine is a chemical messenger between nerve cells that is associated with reward and addiction, among other things.

ECONOMIST: ADHD and lead

It results from a loss of cells in the brain that produce a chemical messenger called dopamine, which coordinates movement.

FORBES: Magazine Article

It seems to stimulate overeating by speeding up production of a chemical messenger in the brain called GABA, or gamma-amino butyric acid.

BBC: NEWS | Health | Gene that makes you eat too much