The sling fibers develop much more intensive contraction to CCK-8 and gastrin-17 than clasp fibers, in which CCKA receptors play more important roles.

• 套索纤维对CCK-8和胃泌素-17刺激的收缩强度显著大于钩状纤维,CCKA受体在其中发挥着更为重要的作用。