Miscellaneous Finals Study Flashcards
Occlusion of the left hepatic artery will cause problems in which liver lobe(s)?
Left Hepatic Artery supplied left lobe, caudate, and quadrate lobes.
(These lobes also empty into left hepatic duct and are served by the same branches of the hepatic portal vein)
Patient with severe jaundice is diagnosed with pancreatic cancer. Where is the tumor located in the pancreas?
Head
This is because a tumor here would block the common bile duct and cause the previously mentioned jaundice!
WHere do parasympathetic and sympathetic fibers in the inferior hypogastric plexus originate?
Sympathetic Lumbar and Sacral Splanchnics synapse in the plexus itself
Parasympathetic Pelvic Splanchnics pass through the plexus and synapse in the walls of pelvic and gut organs.
More or less the equivalent to the vaginal artery in females is the _________ artery in males:
Inferior vesical
Ionic concentration of saliva depends on flow rate. Is ionic concentration higher or lower with a fast flow rate?
What about acidity?
The concentration will be higher and more basic at faster flow rates!
This is because the original solution is basic and full of ions. These ions are removed as the saliva moves through the duct. If it moves through the duct quickly, the concentration and alkalinity will both be higher because it doesn’t have enought time to take it out.
Pump on apical side of parietal cells pushing H ions into the lumen?
H/K ATPase!
What regulator is release in the stomach when the pH is less than 3?
Somatostatin
- Which inhibits gastrin release
- Stops cAMP in parietal cells
- Inhibits ECL release of histamine!
How do NSAIDS cause gastric irritation in the stomach?
They block PGE2 leadign to reduced mucus secretion
BAM irritation!
Good mechanism for stress ulcers?
Catecholamines suppress mucosal bicarb secretion
Caueses gastric irritation!
What is achlorydia?
Reduced acid secretion condition
What signals do fats, acid, and osmolarity in the small intestine send to the stomach?
CCK and Secretin tell the stomach to stop secreting acid and decrease motility
Hyperosmolarity also decreases motility
Do you predict a patient on a proton pump inhibitor will have
increased or decreased duodenal bicarbonate secretion postprandially?
Decreased release because low pH helps stimulate it!
Maximum exocrine pancreas activation occur during which phase of digestion?
Intestinal phase due to release of CCK and secretin
happens duirng cephalic and gastric phases, but much less
How can lack of sleep lead to overeating?
Loss of sleep can lower leptin (satiety) levels and cause hyperphagia
What would be the consequence of giving ghrelin prior to eating at a buffet?
You eat too much!
Stim. appetite
