中国大学MOOC: Local Excitation

中国大学MOOC:"骨骼肌的Excitation-Contraction耦联不包括";

Insulativity is a characteristic of excitation conduction on nerve fiber.

阈值是指 A: 用最小刺激强度，刚刚引起组织excitation的最短作用时间 B: 刺激时间不限，能引起组织excitation的最适刺激强度 C: 能引起组织excitation的最小膜电位 D: 保持一定的刺激时间和强度-时间变化率，能引起组织发生excitation的最小刺激强度

The main power in delivery is: () A: Uterine contraction B: Abdominal muscles and C: diaphragm contraction D: levator ani muscle contractility E: The psyche

中国大学MOOC: 骨骼肌Excitation-Contraction耦联过程的必要步骤是

Insulativity is a characteristic of excitation conduction on nerve fiber. A: 正确 B: 错误

中国大学MOOC:"骨骼肌Excitation-Contraction耦联中起关键作用的离子是";

One feature of news report is meaning contraction, that is, using the least amount of form to encode the most amount of meaning. Of the following choices, which one does not belong to meaning contraction?

The direct motivation for lung ventilation comes from A: lung contraction B: elastic retraction of the lungs C: relief and contraction of respiratory muscles D: intrapulmonary pressure and atmosphere pressure difference