D.Autorhythmicity E.More sensitive to electric stimulation but not sensitive to stretch,chemicals,or cold stimulatio 12.Which of the following descriptions about the slow wave of smooth muscle in alimentary tract is wrong? A.It is the spontaneous depolarization and repolarization. C.After the nerves innervating the gut are cut,the slow wave exists all the same D.It may be the pacemaker potential for smooth muscle E.It causes directly the smooth muscle to contract. 13.Which of the following statements regarding the regulation of gastric secretion is true? A.The autonomic nervous system is involved in cephalic-phase regulation only. B.The autonomic nervous system is involved in gastric-phase regulation only. C.The autonomic nervous system is involved in intestinal-phase regulation only D.The autonomic nervous system is involved in above-mentioned three phases E.Theautonomic nervous system is involved of the above-mentioned three phases. 14.Which of the following is NOT the function of HCI? A.To activate the pepsinogen. B.To kill bacteria C.To stimulate the upper small intestinal mucosa to release secretin D.To promote absorption of the Fe2+and Ca2+in the upper small intestinal E.To promotes vitamin B12 to be absorbed. 15.Vitamin B2 is mainly absorbed in A.Stomach B.Duodenum C.Terminal ileum D.Jejunum. E.Large intestine 16.Which one of the following categories of nerve fiber ususlly conducts action B.Ctype C.Dtype D.Atype E.Etype 17.Which one of the following terms best describes the adding together of postsynaptic potentials generated in quick succession at the same location to produce onger postsynaptic potential? A.retrograde transmissor B.spatial summation C.temporal summation D.neutralization -3of7 ‐ 3 of 7 ‐ D. Autorhythmicity E. More sensitive to electric stimulation but not sensitive to stretch, chemicals, or cold stimulation 12. Which of the following descriptions about the slow wave of smooth muscle in alimentary tract is wrong? A. It is the spontaneous depolarization and repolarization. B. It originates in the Cajal cell. C. After the nerves innervating the gut are cut, the slow wave exists all the same. D. It may be the pacemaker potential for smooth muscle. E. It causes directly the smooth muscle to contract. 13. Which of the following statements regarding the regulation of gastric secretion is true? A. The autonomic nervous system is involved in cephalic-phase regulation only. B. The autonomic nervous system is involved in gastric-phase regulation only. C. The autonomic nervous system is involved in intestinal-phase regulation only. D. The autonomic nervous system is involved in above-mentioned three phases. E. The autonomic nervous system is involved in none of the above-mentioned three phases. 14. Which of the following is NOT the function of HCl ? A. To activate the pepsinogen. B. To kill bacteria. C. To stimulate the upper small intestinal mucosa to release secretin. D. To promote absorption of the Fe2+ and Ca2+ in the upper small intestinal. E. To promotes vitamin B12 to be absorbed. 15. Vitamin B12 is mainly absorbed in A. Stomach. B. Duodenum. C. Terminal ileum. D. Jejunum. E. Large intestine. 16. Which one of the following categories of nerve fiber ususlly conducts action potentials at the fastest speeds? A. B type B. C type C. D type D. A type E. E type 17. Which one of the following terms best describes the adding together of postsynaptic potentials generated in quick succession at the same location to produce a stronger postsynaptic potential? A. retrograde transmisson B. spatial summation C. temporal summation D. neutralization