11．動(dòng)脈血中CO₂分壓高，引起呼吸加深加快主要通過(guò)(      )

A．延髓化學(xué)感受器                                       B．頸動(dòng)脈體化學(xué)感受器

C．肺牽張感受器                                          D．主動(dòng)脈體化學(xué)感受器

12．產(chǎn)生節(jié)律性呼吸的最基本中樞位于(      )

A．脊髓                                                        B．延髓

C．中腦                                                        D．大腦皮層

13．使胰脂肪酶作用大為增加的物質(zhì)是(      )

A．進(jìn)入小腸的胃酸                                       B．碳酸氫鹽

C．胃腸道激素                                              D．膽鹽

14．唾液中的主要消化酶是(      )

A．溶菌酶                                                     B．蛋白水解酶

C．肽酶                                                        D．淀粉酶

15．胃排空的原動(dòng)力是(      )

A．胃運(yùn)動(dòng)                                                     B．胃內(nèi)容物的體積

C．幽門(mén)括約肌的活動(dòng)                                   D．食物理化性質(zhì)對(duì)胃粘膜刺激