HY EQUATION QUESTIONS
FOR USMLE STEP 1
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HY Equation Questions for USMLE Step 1
Concept…………………………………………………………………………………………..……...Question #
Hardy-Weinberg………………………………………………………………………………………..……….1-5
Mean arterial pressure…………………………………………………………………………………..…………6
Stroke volume……………………………………………………………………………………..………………7
Ejection fraction……………………………………………………………………………………..…………….8
Total peripheral resistance………………………………………………………………..……………………9,10
Cardiac output……………………………………………………………………………………..……………..11
Oxygen consumption……………………………………………………………………………….…….………12
Renal vascular resistance……………………………………………………………………..………………….13
Oncotic-/hydrostatic-driven fluid shift……………………………………………………….……….………14,15
Renal plasma flow………………………………………………………………………….………….…………16
Renal blood flow…………………………………………………………………………….………….………..17
Glomerular filtration rate…………………………………………………………………….………….……….18
Filtration fraction……………………………………………………………………………….…………….19,21
Renal clearance……………………………………………………………………………..……………………20
Winter’s formula…………………………………………………………………………..……………………..22
Henderson-Hasselbach………………………………………………………………………..………………….23
Acid-base/Anion gap…………………………………………………………………………..……………..24-26
Alveolar pO2………………………………………………………………………………………..……………27
Dead space…………………………………………………………………………………………...………..28,29
Pulmonary vascular resistance……………………………………………………………………..…………….30
Parkland formula…………………………………………………………………………………..………….31,32
Loading dose……………………………………………………………………………………..………………33
Plasma drug concentration………………………………………………………………………..……………...34
Maintenance dose………………………………………………………………………………………..……….35
Steady state concentration……………………………………………………………………………..…………36
Volume of distribution/clearance……………………………………………………………………..………37-39
Half-life……………………………………………………………………………………………..……………40
Rate of elimination………………………………………………………………………………..…………..41,42
Salicylate acid-base………………………………………………………………………………..……………..43
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1. A group of epidemiologists and geneticists is studying the frequency of alleles A and a in
a population. They find that the population is in Hardy-Weinberg equilibrium. The
frequency of the allele A is 0.12 and the frequency of the allele a is 0.88. Which of the
following represents the percentage of heterozygous individuals in this population:
a) 1.44%
b) 10.56%
c) 21.12%
d) 33.00%
e) 77.44%
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