In the actual examination, answers will be selected on the screen; no answer form will be provided. e . Shortened PR interval (i. A Ghon complex should also be suspected in an individual with a history of exposure to Mycobacterium Tuberculosis (M. One proposed mechanism involves abnormalities in the placenta, the organ that develops in the uterus and nourishes the fetus throughout pregnancy. , individuals with AIDS, cancer, or receiving anticancer medications), substance abuse, working Answers 23 first degree heart block, the PR interval is prolonged, greater than 0. version to become familiar with all item formats and exam timing. INTRODUCTION TO USMLE STEP 1 SAMPLE TEST QUESTIONS What causes toxemia in pregnancy? Toxemia in pregnancy may be caused by multiple factors. The majority would think that you have to repeat your NBME exams in order to retain the answers. g. Not going to lie, when I was studying for Step 1 with the NBME Practice Exams, I thought the same. An answer key is provided on page 49. Tuberculosis), or presence of risk factors, such as immunocompromised status (e. 2s (200ms) (D). How is a Ghon complex diagnosed? Diagnosis is usually based on radiographic findings on chest X-ray. An answer form for recording answers is provided on page 48. However, my tutor advised me to do the opposite