First aid usmle step 3 - Study guides, Class notes & Summaries

First Aid USMLE Step 1: Biochemistry Exam Practice Questions and Answers (100% Pass) What is a nucleoside? What is a nucleotide? Which are the purines? Which are the pyrimidines? - Answer️️ -Side = base + (deoxy)ribose [sugar] Tide = base + (deoxy)ribose [sugar] + phosphaTe *Which are the purines?* "pure as gold" = Adenosine, Guanosine *Which are the pyrimidines?* "CUT the pyramid" = Cytosine, Uracil, Thymine In the nucleotide synthesis pathway, describe how purine synthesis ...

First Aid USMLE Step 1- Reproductive Organ Systems + Embryology 2023 Update Sonic Hedgehog Gene - ANS-Produced @ base of limbs in zone of polarizing activity Involved in patterning along anterior/posterior axis *SUMMARY: Anterior/posterior pattern* Wnt-7 Gene - ANS-Produced @ apical ectodermal ridge (thickened ectoderm @ distal end of each developing limb) Necessary for organization along dorsal/ventral axis *SUMMARY: Dorsal/ventral pattern* FGF Gene - ANS-Produced @ apical ectoderma...

USMLE Step 1 First Aid – Microbiology with complete solution Cell Wall Overall Picture - Compare *Gram (+) to Gram (-)* - answer *Flagellum* on bacteria is composed of what? What is the function? - answerComposition: Proteins Function: motility *Pilus/Fimbria* on bacteria is composed of what? What is the function? - answerComposition: Glycoprotein Function: Mediate adherence of bacteria to cell surface, sex plus during conjugation. *Spore* formation is ONLY possible is what type of b...

THIRD EDITION CASE FILES® Psychiatry Eugene C. Toy, MD The John S. Dunn, Senior Academic Chair and Program Director The Methodist Hospital Ob/Gyn Residency Program Houston, Texas Vice Chair of Academic Affairs Department of Obstetrics and Gynecology The Methodist Hospital Houston, Texas Associate Clinical Professor and Clerkship Director Department of Obstetrics and Gynecology University of Texas Medical School at Houston Houston, Texas Associate Clinical Professor Weill Cornell C...

First Aid USMLE Step 1 Cardiovascular Questions And Answers 2023 (A+) Truncus arteriosus gives rise to __________. - ANS-Ascending aorta and pulmonary trunk Bulbus cordis gives rise to __________. - ANS-Smooth parts (outflow tract) of left and right ventricles Endocardial cushion gives rise to? - ANS-Atrial septum ,membraneous interventricular septum; AV & semilunar valves Primitive atrium gives rise to __________. - ANS-Trabeculated (muscular) portions of the left and right atria...

First Aid USMLE Step 1: Biochemistry Exam Study Questions and Answers What is a nucleoside? What is a nucleotide? Which are the purines? Which are the pyrimidines? - ANSWER-Side = base + (deoxy)ribose [sugar] Tide = base + (deoxy)ribose [sugar] + phosphaTe *Which are the purines?* ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 2/152 "pure as gold" = Adenosine, Guanosine *Which are the pyrimidines?* "CUT the pyramid" = Cytosine, Ur...

What number is in the denominator for the RATE of divorce? - Answer Per 100 marriages What number is in the denominator for the RATE of infant mortality? - Answer Per 1000 live births What is the typical RATE given in epidemiology for most cases? - Answer Per 100,000. What are most disease rates in the US for most all diseases? - Answer Less than 50 per 100,000.... Almost ALL are below 100 per 100,000 What is an INCIDENCE rate? - Answer The rate of NEW cases in a population divided b...

Step 1 Express 2021 workbook: PHARMACOLOGY page 1 © First Aid for the USMLE Step 1, 2021 edition Pharmacology PHARMACOKINETICS AND PHARMACODYNAMICS 1. Competitive inhibitors ________ (do/do not) resemble the substrate, but noncompetitive inhibitors __________ (do/do not) resemble the substrate. (p 232) 2. Km is inversely related to the ______________ of the enzyme for its substrate. (p 232) 3. True or False: In enzyme kinetics, the lower the Km , the higher the affinity. (p 232) ________...

THIRD EDITION CASE FILES® Psychiatry Eugene C. Toy, MD The John S. Dunn, Senior Academic Chair and Program Director The Methodist Hospital Ob/Gyn Residency Program Houston, Texas Vice Chair of Academic Affairs Department of Obstetrics and Gynecology The Methodist Hospital Houston, Texas Associate Clinical Professor and Clerkship Director Department of Obstetrics and Gynecology University of Texas Medical School at Houston Houston, Texas Associate Clinical Professor Weill Cornell C...

First Aid USMLE Step 1- Pharmacology (Complete) Exam 2023 Penicillin G (IV and IM) Penicillin M (oral) - ANS-*MOA:* *β-lactam*: a structural analog of D-ala-D-ala (a normal component of cell walls) which binds and inactivates bacterial transpeptidases (penicillin-binding protein, PBPs) to block peptidoglycan cross linking *Clinical use:* Bactericidal for Gram-⊕ cocci/rods, Gram-⊖ cocci (Neisseria), and spirochetes Mostly used for Gram-⊕ organisms (S. pneumoniae, S. pyogenes, A...