n.乙酰胆碱；乙酰胆碱乙酰胆碱

Acetylcholine is a neurotransmitter that plays a crucial role in muscle contraction and memory formation.
乙酰胆碱是一种神经递质，在肌肉收缩和记忆形成中起着关键作用。
The release of acetylcholine at the neuromuscular junction triggers muscle contractions.
在神经-肌肉接头处释放乙酰胆碱会引发肌肉收缩。
Alzheimer's disease is characterized by a decrease in acetylcholine levels, affecting cognitive function.
阿尔茨海默病的特点是乙酰胆碱水平下降，影响认知功能。
Cholinesterase inhibitors are drugs used to treat Alzheimer's, as they prevent acetylcholine breakdown.
氨基酸酶抑制剂是治疗阿尔茨海默病的药物，因为它们可以阻止乙酰胆碱的分解。
In nerve cells, acetylcholine is stored in vesicles awaiting release during signaling.
在神经细胞中，乙酰胆碱储存在囊泡中，等待在信号传递时释放。
Nerve impulses stimulate the release of acetylcholine from motor neurons to muscle fibers.
神经冲动刺激运动神经元向肌纤维释放乙酰胆碱。
Acetylcholine is involved in the parasympathetic nervous system's calming effect on the heart.
乙酰胆碱参与副交感神经系统对心脏的安抚作用。
The vagus nerve, rich in acetylcholine, helps regulate digestion and blood pressure.
含有大量乙酰胆碱的迷走神经有助于调节消化和血压。
In the brain, acetylcholine is associated with attention, learning, and mood regulation.
在大脑中，乙酰胆碱与注意力、学习和情绪调节有关。
Research suggests that regular exercise may increase acetylcholine levels, contributing to improved cognitive function.
研究表明，定期锻炼可能增加乙酰胆碱水平，从而改善认知功能。