NBME 25 Fetal hemoglobin concentration (NBME Answers)
WEBFactors that move the oxygen dissociation curve to the right are those physiological states where tissues need more oxygen. For example, during exercise, muscles have a higher metabolic rate, and consequently need more oxygen, produce more carbon dioxide and lactic acid, and their temperature rises (from Wikipedia on the O2-Hb dissociation curve).
NBME 21 Splenic and left renal (NBME Answers)
WEBThe extrahepatic portocaval shunt for the treatment of portal HT is between the splenic vein and left renal vein. The intrahepatic portocaval shunt is between the portal vein and hepatic veins. This can be found in the 100 concepts anatomy ppt.
NBME 19 Reabsorption of fluid into systemic capillaries (NBME …
WEBI got this one through the process of elimination. He has significant blood loss, which can be inferred he might be in hypovolemic shock. This would activate the sympathetic nervous system, which would contract the systemic arteriole and venous smooth muscle to shunt blood back to the heart. Secretion of renin will be increased to increase BP.
NBME 24 Palpable right ventricular lift (NBME Answers)
WEBIt says O2 saturation in the right ventricle is 70, which is equal to the Right atrium and vena cava. It says the O2 saturation in the left ventricle is 82%, which is a decrease from the LA (95) but not equal to the RV, which is why I thought there wasn't a VSD, I assumed there was a weird shunt from the LV to some other part.
NBME 21 Decreased alveolar Po2 (NBME Answers)
WEBNBME Answer (Retired!) Explanations — Updated daily. Hypoxic pulmonary vasoconstriction (HPV), also known as the Euler-Liljestrand mechanism, is a physiological phenomenon in which small pulmonary arteries constrict in the presence of alveolar hypoxia (low oxygen levels).
NBME Answers : Recents
WEBFactors that move the oxygen dissociation curve to the right are those physiological states where tissues need more oxygen. For example, during exercise, muscles have a higher metabolic rate, and consequently need more oxygen, produce more carbon dioxide and lactic acid, and their temperature rises (from Wikipedia on the O2-Hb dissociation curve).
NBME 22 Tricuspid insufficiency (NBME Answers)
WEBI also think the problem being so acute also points to a cardiac origin. Reading the question again, portosystemic shunt isn't so much a diagnosis as a sequelae. I could imagine tricuspid insufficiency eventually causing shunt, but …
NBME 16 Dead space (NBME Answers)
WEBNBME Answer (Retired!) Explanations — Updated daily. Large embolus obstructing pulmonary blood flow = Perfusion defect There is no capillary bed around smaller bronchi/bronchioles and they form the anatomical dead space.
NBME 13 Inhibition of renin release (NBME Answers)
WEBNBME Answer (Retired!) Explanations — Updated daily. ANP is secreted by the atrial myocytes and result in this set of physiological responses:
NBME 24 Respiratory acidosis (NBME Answers)
WEBNBME Answer (Retired!) Explanations — Updated daily. Keycompany gave the quick, simple explanation. but from a less-clinical perspective: If anyone has ever been "Lit-up" on the football field, or just generally ever had the "wind-knocked out" of them, you know that your breathing for the next 5 minutes is very shallow because it …