What are the components of gastric secretion and respective functions (10 Points)

问答题What is the action potential and its forming mechanisms in nervous fiber or skeletal muscle(10 Points)

问答题Describe the meaning for major components and intervals of ECG. (10 Points)

问答题What are regulative patterns of human physiological function and each characteristic(15 points)

问答题Functional residual capacity:

多项选择题Effective refractory period (ERP):