In normal condition, the effective stimulation which may keep the respiratory center in-excitement is ()
A. afferent impulse from pulmonary stretch receptor
B. afferent impulse from proprioceptors in respiratory muscle
C. hypoxia in certain level
D. CO2 in certain concentration
E. CO2 in high concentration
查看答案
The most important physiological factor of regulating respiratory movement is ()
A. CO2
B. O2
C. H+
D. 2,3-DPG
E. CO
the largest and most complex endocrine organ in human body is ()
A. Thyroid gland
B. Hypophysis
C. Hypothalamus
D. Gonad
E. Digestive tract
Secretion of which of the following substances is inhibited by low pH? ()
A. Secretin
B. Gastrin
Cholecystokinin (CCK)
D. Vasoactive intestinal peptide (VIP)
E. Gastric inhibitory peptide (GIP)
The function of gastric mucosal barrier is ()
A. Prevent pepsin from digesting gastric mucosa
B. Prevent Cl- from invading mucosa from gastric cavity
C. Prevent the diffusion of calcium from mucosa to gastrointestinal tract
D. Prevent H+ gastric cavity from invading mucosa
E. Prevent the spread of Na+ from mucosa to gastrointestinal tract
微信支付 
支付宝支付