9/8/12 a Flashcards
(35 cards)
What eq’n relates flow (Q) to resistance (R)?
Q = P1-P2 / R
What is the eg’n for Resistance?
R = η*L / r^4
where η = viscosity, L=length; r = radius
What eq’n, then, relates Q to r?
Q = [(P1-P2) / (η*L)] * r^4
In words, how does Q relate to r?
Q is proportional to r^4
What is the clinical manifestation of oculomotor diabetic neuropathy?
down and out gaze
What is the mech of oculomotor diabetic neuropathy? How does the anatomy of CN III affect the Sx?
ischemia of CN III; somatomotor fibers in center of nerve (parasympathetic unaffected b/c at periphery)
What fibers of CN III are affected in compression of the nerve as in uncal herniation?
motor and parasympathetic
What is the effect of parasympathetic dysfunction in the oculomotor nerve?
mydriasis
What is the effect of subarachnoid hemorrhage on the oculomotor nerve?
compression, loss of pupillary reflex
What is the effect of prolactin on GnRH?
reduced production
What is the intracellular target of Rifampin?
RNA polymerase
HBV can be detected in all bodily fluids except _______.
stool
When does anti-HBs IgG appear in the serum?
After vaccination or successful resolution of HBV infection.
What is the usual route of HCV transmission?
Hematologic (i.e. IV drug use or blood transfusion).
What is the usual route of HDV infection?
blood
ECG shows ST-elevation in leads V1 and V2 along with 2nd degree heart block. What coronary artery is likely infarcted?
LAD
A proximal infarction of the LAD could cause ST-elevation in which leads?
V1-V4
Transmural ischemia resulting from occlusion of the circumflex a. would lead to ST-elevation in which leads?
V5 and V6; possibly I and aVL
A STEMI d/t occlusion of the left main coronary artery would be expected to cause ST-elevation in which leads?
all chest leads and possibly I and aVL
An “inferior wall infarct” would most likely result from an occlusion of which artery?
PDA / RCA
Which enzyme of the TCA cycle also serves as complex II of the electron transport chain? What cofactor does it require?
succinate dehydrogenase; FAD
G6PD is the RLS in what p-way?
pentose phosphate shunt!!!
What neoplams are associated w/ H. pylori infection?
gastric adenocarcinoma and MALToma (mucosa-associated lymphoid tissue tumor)
Within the lung, rupture of apical blebs is thought to be the cause of _______.
spontaneous pneumothorax