USMLE Histology Exam Questions with Correct Verified Solutions 100% Guaranteed Pass

USMLE Histology Exam Questions with Correct Verified Solutions 100% Guaranteed Pass What strains of HPV cause condylomata accuminatum? - ANS 6 and 11 cause genital warts. This is not the cause of CIN!. That is 16,18,31,33,35. HPV assd oncogenesis is caused by proteins E6 and E7 which knock out Rb and P53 causing uninterrupted cell cycle growth. Which subunit of ribosome attaches to RER? - ANS Large subunit. It binds to riboporins on ER. Where are the Z line in a sarcomere? - ANS They are within the actin region (I band) What line is found in the center of the H bind and A band? - ANS M line. It is where all the myosin overlap. In which organelle is pro-insulin cleaved into insulin and CRP? - ANS Golgi. Then together they are packaged into vesicles and sent into the body. Androgens get converted to estrogens in what cell of the female ovary? - ANS Granulosa cells. They have aromatase. Cholesterol is made into Androgens (with release of Progesterone) by Theca interna (LH dictates this). Then Granulosa cells pick up androgens and make Estrogen (FSH dictates this). Theca externa doesn’t participate in steroidogenesis. It is fibroblasts and smooth muscle for support. Why does HPV affect the true vocal folds but not the false folds or laryngeal vestibule, or even the tracheal bifurcation or paranasal sinuses? - ANS HPV likes stratified squamous epith which is what the true vocal folds are made of. Laryngeal vestibule is the space between lower epiglottis to False folds and it's made of ciliated, pseudostratified, columnar mucus-secreting epith. Trachea is same. So are paranasal sinuses. Explain the glands of the duodenum? - ANS There are goblet cells interspersed in the brush border. There are Crypts of Lieberkühn, simple tubular glands, in the lamina propria, immediately atop the muscular mucosa, that deliver secretions to the interpillar spaces. Deeper, below the muscular mucosa, is the submucosa, where the compound Brunner glands are. They are unique to the duodenum because they have strongly alkaline secretions that track upwards and into those crypts of Liberkuhn for release into lumen. (the crypts are all throughout the intestines and colon but RAMIFIED TUBULAR BRUNNER's Glands are