Concerning penile erection, which of the following statements isincorrect?
| a) The parasympathetic nervous system releases nitric oxide |
| b) Nitric oxide activates a G-protein coupled receptor whichgenerates cGMP |
| c) Cytosolic level of cGMP increases |
| d) The cytosolic calcium concentration decreases and this leadsto vasodilation |
| e) The sinuses in the corpora cavernosa become engorged withblood |
Which of the following statements about gastric acid secretionis true?
| a) In an unstimulated parietal cell the amount of H+-K+-ATPasepresent is low |
| b) H+ is secreted across the basolateral membrane of theparietal cell by the H+-K+-ATPase |
| c) HCO3- leaves the parietal cell at the basolateral membrane,and its downhill efflux powers the uphill entry of Cl- into theparietal cell |
| d) Cl- is secreted into the secretory canaliculus via a Cl-active transport protein |
| e) H2 receptor blockers inhibit HCl secretion by directlyinhibiting the H+-K+-ATPase |
This neurohormone is produced by the enteroendocrine cells ofthe gastrointestinal tract especially the stomach and it increasesfood intake and somatotropin secretion
