Now, the other thing to keep in mind is that for any cell there's not just one receptor on the cell, there are thousands, or hundreds of thousands of receptors.

我们要记住的另一点是,在细胞表面,不仅仅只有一个受体,而是有成千上万甚至更多的受体分子

耶鲁公开课 - 生物医学工程探索课程节选