Answers

The answer is b. (Guyton, pp 742-746.) Gastric acid secretion by the parietal cells occurs in response to neural (acetylcholine), hormonal (gastrin), and paracrine (histamine) excitatory inputs. Secretion of HCl by the parietal cell involves H+-K+-ATPase actively pumping H+ out of a cell in exchange for K+ entering the cell. Inhibition of pump activity leads to a prolonged increase in gastric pH and the removal of the inhibitory effect of low pH (< 3.0) on gastrin release. The...

Questions

DIRECTIONS Each question below contains five suggested responses. Select the one best response to each question. 147. Chronic administration of which of the following types of drugs would lead to a sustained increase in serum gastrin levels 148. Which one of the following statements about small intestinal motil-ity is correct a. Contractile frequency is constant from duodenum to terminal ileum b. Peristalsis is the major contractile pattern during feeding c. Migrating motor complexes occur...

Questions 235236

Use the following diagram to answer the questions. 20 Use the following diagram to answer the questions. 20 0 20 40 60 80 100 120 140 160 (mmHg) 0 20 40 60 80 100 120 140 160 (mmHg) 235. What is the P50 of the oxyhemoglobin curve labeled A in the diagram 236. Which of the following conditions is most likely to shift the above oxyhemoglobin curve from A to B c. Acclimatization to high altitude 237. Which one of the following is higher at total lung capacity than it is at residual volume b....