In which phase below, the intrapulmonary- pressure equals to atmosphere pressure ()
A. at the beginning of expiration and inspiration
B. at the end of inspiration and the beginning of expiration
C. at the beginning of inspiration and the end of expiration
D. at the end of expiration and the beginning of inspiration
E. at the end of expiration and the end of inspiration
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The effect of sympathetic stimulation on gastrointestinal tract is ()
A. Inhibition of gastrointestinal motility and secretion
B. Increased gastrointestinal motility and secretion
C. Gastrointestinal motility and secretion inhibition
D. Gastrointestinal motility inhibition and secretion enhancement
E. The gastrointestinal motility was enhanced, and the secretion did not change significantly
The misrepresentation of gastric acid secretion is ()
A. Parietal cell secretion
B. It takes energy
C. Proton pump plays a key role in H + secretion
D. Coupling of H+ secretion and K+ intracellular transport
E. When HCO3- is secreted by parietal cells, the plasma pH will decrease
Endogenous substances that can promote gastric acid secretion ()
A. Tryptophan
B. Gastric inhibitory peptide
C. Ach
D. Epidermal growth factor
E. Somatostatin
肺表面活性物质减少将导致 ()
A. 肺难以扩张
B. 小肺泡内压小于大肺泡内压
C. 肺弹性阻力减小
D. 肺泡表面张力降低
E. 肺顺应性增加
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