【单选题】Which of these can seal the top of the cylinder?
【单选题】Which of these can dissolve a blood clot?
【单选题】Which of these expressions can be used to contradict someone?
【单选题】Which of these processes can cause a local potential?
A.
changes in membrane permeability
B.
ligands binding to their receptors
C.
mechanical stimulation
D.
changes in the charge across the plasma membrane
【单选题】( ) 水溶性生物碱主要指的是:_________.
【多选题】Which of these people can suffer from a lot of stress?