11．平靜呼氣時(shí)，吸氣肌舒張，胸膜腔內(nèi)壓（　　　）

A．等于零                                                     B．等于大氣壓

C．負(fù)值減少                                                 D．負(fù)值增加

12．產(chǎn)生呼吸節(jié)律的基本中樞是（　　�。�

A．脊髓                                                        B．延髓

C．大腦皮層                                                 D．下丘腦

13．切斷家兔雙側(cè)迷走神經(jīng)后呼吸的改變是（　　�。�

A．呼吸頻率加快                                          B．呼吸幅度減小

C．吸氣時(shí)相縮短                                          D．呼吸頻率減慢，幅度增大

14．機(jī)體中最重要的消化液是（　　�。�

A．胃液                                                        B．胰液

C．膽汁                                                        D．小腸液

15．通常把物質(zhì)代謝過(guò)程中所伴隨著的能量的貯存、釋放、轉(zhuǎn)移和利用稱為（　　�。�

A．能量代謝                                                 B．基礎(chǔ)代謝

C．基礎(chǔ)代謝率                                              D．氧熱價(jià)