pacemaker cell造句

• Single pacemaker cell
  单起搏细胞
• The cardiac impulse originates in a relatively small group of primary pacemaker cells . typical primary pacemaker cells have the highest intrinsic frequency in firing . following its firing , there is a slow depolarization called pacemaker potential
  位于右心房窦房结内的起搏细胞具有最高的固有发放节律，每次发放后即出现一个缓慢的自动去极化过程，心率主要取决于起搏细胞去极化的斜率。