Histology NBME Full Questions with Correct Answers

1.Nuclear pores: A)Combine to form a hexagonal structure B)Have 50nm in diameter C)Their number is not connected with cellular activity D)Nuclear lamina are connected to their inner rings E)A and C are correct F)B and D are correct Correct Answer E)A and C are correct The conducting zone of the respiratory system: A) Includes the upper airways, trachea and the bronchial tree (including the terminal bronchioles) B) Is designed for airflow and respiration C) Includes only the nose and the pharynx D) Is designed for olfactory E) A and C are correct F) B and D are correct Correct Answer A) Includes the upper airways, trachea and the bronchial tree (including the terminal bronchioles) ***The bronchial tree starts with the primary bronchi: A)And ends with the respiratory bronchioles B) And on each section is lined with the simple columnar epithelium C) And is composed of submucosa with plates of fibrocartilage D) And is part of the conducting portion E) A and C are correct F) B and D are correct Correct Answer D) And is part of the conducting portion ***The feature of skeletal muscles is: A) Composed of mononucleated cells B) Have myofibrils that does not possess A bands C) Are composed of bundles of multinucleated fibers D) Their contraction is slow and not subject to voluntary control E) A and C are correct F) B and D are correct Correct Answer C) Are composed of bundles of multinucleated fibers ***In the skeletal muscle thin filaments are composed of: A) Actin B) Myosin C) Tropomyosin D) Light and heavy chains