Week1 Lectures Flashcards
___ (3) are reabsorbed in the kidney
Na+, Cl-, water
___ (1) are excreted in the kidney
H+
___ (2) are reabsorbed and secreted in the kidney
K+ and Uric Acid
hint: creatinine + inulin are unchanged
- porous nephron segment -
- trancellular transport (K+, H20) -
- 85% HCO3- abs -
- site of CAi -
- site for SGLT2 drugs (diabetes)
Proxtimal Tubule
hint: abs carbonate, excretes acid
- Passive water movement based on conc gradient -
- tx site of osmotic diuretic aquaresis after entry (eg mannitol)
segment?
Descending limb LOH
- impermeable segment to water -
- dilutes tubular fluid permb to small solutes (25% Na)
segment?
Thin Ascending Limb LOH
hint: diluting segment
___(enz) restores nephron’s chemical electroneutrality
___(enz) is inh by loop diuretics –> Mg and Ca loss w/ Na, K, Cl
ROMK (electroneutrality);
NKCC2 (loops diuretics)
Renal Autocoids (3)
- Adenosine
- Prostaglandins
- peptides (ANP/BNP vasoD’s)
Renal Hormones (5)
- Renin-Ang sys
- EPO
- Aldosterone (MR rcp Na reabs)
- 1,25 OH Vitamin D3 (via I-𝛂-OHase)
- ADH (V2 rcp water abs)
autocoid responsible for:
- afferent arteriole vasoD
- glomerular blood flow autoregn
- ↓Na reabs in LOH;
- ↓H2O transport in CTs
Prostaglandins
Nephron segment: -
- active NCC co trnsporter -
- impermb to water -
- Apical Mg channel -
- baso Na/Mg transporter
DCT I
hint: 25% NaCL reabs
Nephron segment: -
- active NCC co transporter -
- apical ENaC channel for Na+ -
- baso Cl channel -
- baso Ca/Na + Ca active transporters (PTH reg’d)
DCT II hint: 25% NaCL reabs
____(celltype) in the collecting duct (CD) transports Na, K, H2O; while ____ (celltype) have acid base function in CD (𝛂 for H+ and β for HCO3-)
principle cells;
intercalated cells (𝛂 and β)
Name presentation and causative fungus? -
- hypersensitivity rxn to inftn
- complicates asthma or CF -
- dx on exam -
- treat with itraconazole, sinus surgery , xolar
ABPA from Aspergillosis
Name presentation and causative fungus? -
- colonizing fungus ball after cavitary lung disease -
- air crescent/grape cluster on scan (dx) -
- tw itraconazole vel surgery
Aspergilloma from Aspergillosis
Name presentation and causative fungus? -
- mimics TB air crescent on scan -
- needle-aspirate lung fluid for histo -
- ↑risk for alocoholism , COPD, CGD -
- tw voriconazole + AmphoB
CNPA from Aspergillosis hint: unresponsive to antibiotics
Name presentation and causative fungus? -
- resp distress after prfound PMH of IMNS -
- halo sign on scan (dx) -
- needle/biopsy for histo (Acute Angles*)
Invasive from Aspergillosis
Whats the dx and Tx? -
- Caused by rhizopus -
- deadly invasive vasculitis from env mold -
- non septate right angle* on histo -
- sinus entry –> brain invasion –> infarction -
- Risk: unctrl’d T2DM, Fe overload , IMNS
Mucormycosis (Rhinocerebral, wound, cutanous, lung/GI) tw amphoB + surgery
Whats the dx and Tx? -
- ubiq env mold + rare.fatal inftn -
- seen in HSCT pts -
- eye, lung, and skin sx -
- blood culture + histo dx
Fusarium (mycotoxicosis, local, disseminated) tw amphoB + voriconazole
Whats the dx and Tx? -
- ↓host imm resp -
- late ppt: meningitis; skin; nodules; pulm sx -
- dx: biopsy, CSF, crag
Cryptococcosis tw Fluctyosine –> AmphoB –> fluconazole
how does arteriolar tone affect vascular function curves (esp venous return)
- arterioles hold min vol thf MSFP is not changed -
- blood trapped upstream via vasoC –> ↓venous blood –> ↓venous P + reutrn at any CVP -
- vice versa w/vasoD
vasc pressure when blood flow ceases?
mean systemic filling pressure (MSFP) hint: ∝ blood vol
determinants of systolic fx? (3)
- preload
- afterload
- contractility
COPD, effusion, congestion, or obesity would cause voltage signal to (increase/decrease)
decrease (more distant)
Myocardial hypertrophy would cause EKG voltage to (increase/decrease)
increase (large muscle)
____ (chemical class) ↑ intracell cAMP, Ca+, and contractility
catecholamines
Normal ejection fraction (EF)
55-65%
- ∆ perfusion to body -
- ↑ fluid in lungs (congestion) -
- SOB + pulm edema
characterizes…
Left heart failure
- ∆ perfusion to lung -
- ↑ fluid in periphery -
- ascites + periph edema
characterizes…
right heart failure
whats the dx? -
- ∆ NCC in distale tubule (SLC12A3) -
- hypoMg* + hypoK + alkalosis + ↑plasma renin + aldo
- ± low BP -
- caused by LOOP diuretics
Gitelman’s syndrome (low serum Ca+)
hint:
- Bartter’s + hypoMg
- dump bicarb –> ↑water into lumen
whats the dx? -
- ∆ NKCC2 symporter in Thick Asc LOH (SLC12A1) -
- hypoK + alkalosis + ↑plasma renin + aldo -
- ± low BP
- caused by THIAZIDE diuretics
Bartter’s Syndrome (high urine Ca+)
hint: water (vol) drops –> renin/aldo↑
what Rx combo is used for nephron paralysis? (3)
CAHi + loop + distal diuretics
what’s this rare AD dz? and how do you tx? -
- gain of fx: EnAC channels -
- clinica; ppt: htn, ↑Na+ reabs, K wasting
Liddle’s Syndrome
tw
- K-sparing diuretics:
- amiloride (or triamtereneif allergic )
2 yrs dapsone + rifampin is tx for ___
Tuberculoid Hansen’s (M. Leprae)
Hansen’s disease form chr by:
- Paucibacillary,
- vigorous, but ineffective CMI (CD4+, Th1) –> PPD⊕
- nerve damage (clawed hands + toes, foot drop)
Tuberculoid
Hansen’s disease form chr by:
- multibacillary ,
- weak CMI (useless Th2 w/ Abs) –> PPD⊖
- extensive cutaneous sx
lepromatous
hint: lionine facies
____ has no in vitro culture system, slowest growing human pathogen, only affects 5-10% of humans*, prefers 30-37C
M. Leprae
common ppt: asymptomatic seroconversion*
Scrofula in kids indicates ___ inftn; while in adults indicates ____
Atypical Mycobacterial inftn; TB
key histo features for M. Leprae inftn? (2)
- foam cell mø’s
- granulomatous epiths + lymphos
hint: skin smear/punch biopsy
Labs for M. Leprae in the US and Abroad
PPD (abroad):
Serology (US):
- LMIT for tuberculoid
- phenolic glycolipid-1 for lepromatous
- health care worker exposed to Mleprae
- pt with tuberculoid form
- previous lepromatous form responding to tx
these are indicative of (neg/pos) lepromatin PPD?
POSTIVE PPD
- naive pt
- lepromatous leprosy
these are indicative of (neg/pos) lepromatin PPD?
NEGATIVE PPD
Name that drug:
- Unknwon MOA
- SEs: N/V; hepatotox; HS rxns
Pyrazinamide
Large proteins, cells, and complexes that can be centrifuged* out is a job for ____ (procedure)
Apharesis
hint: exchange (replace) vs true pheresis (substract)