Histology NBME full questions

Histology NBME full questions 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 - 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 - 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 - 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 - 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 E) A and C are correct F) B and D are correct - E) A and C are correct ***The contraction of skeletal muscle requires: A) GTP B) ATP C) Mg ions D) Ca ions E) A and C are correct F) B and D are correct - F) B and D are correct ***Sarcomere: A) Is the basic contractile unit of skeletal muscle B) Is the basic contractile unit of smooth muscle C) Consist of thick and thin filaments D) Extends from A band to M line E) A and C are correct F) B and D are correct - E) A and C are correct ***What cell type secretes ACTH? A) Lactotropic cells B) Thyrotropic cells C) Somatotropic cells D) Corticotropic cells E) A and C are correct F) B and D are correct - D) Corticotropic cells ***Which of the following phrases concerning osteocytes are correct: A) Oval active cells B) Placed in Howship's lacunae C) Secrete osteoid D) Almond-shaped cells E) A and C are correct F) B and D are correct - D) Almond-shaped cells ***Periosteum consists of: A) Outer layer of collagen fibers and fibroblasts B) Outer layer of osteoprogenitor cells C) Inner layer of osteoprogenitor cells D) Inner layer of collagen fibers and fibroblasts E) A and C are correct F) B and D are correct - E) A and C are correct ***Which of the following phrases concerning intramembranous ossification are correct: A) Is source of most of the flat bones B) Is source of most of the long bones