Histology NBME full questions and Answers Latest 2022

Histology NBME full questions and
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 - 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 - 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 - 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 - 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
E) A and C are correct
F) B and D are correct - ANSWER E) A and C are correct

,Histology NBME full questions and
Answers
***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 - ANSWER 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 - ANSWER 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 - ANSWER 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 - ANSWER 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 - ANSWER 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
C) Begins from mesenchymal condensation

,Histology NBME full questions and
Answers
D) Starts from the bone collar formation
E) A and C are correct
F) B and D are correct - ANSWER E) A and C are correct

***Which cell type are involved in the secretion thyroglobulin?
A) Principal cell
B) Oxyphil cell
C) Parafollicular cells
D) Follicular cells
E) A and C are correct
F) B and D are correct - ANSWER D) Follicular cells

***Which part the adrenal gland secretes glucocorticoids?
A) Chromaffin cells
B) Zona reticularis
C) Zona glomerulosa
D) Zona fasciculata
E) A and C are correct
F) B and D are correct - ANSWER D) Zona fasciculata

***Which of the following is NOT a characteristic of the endocrine system?
A) Products secreted into blood
B) Glands with ducts
C) Secretes hormones
D) Secretory activity of endocrine gland is controlled
E) A and C are correct
F) B and D are correct - ANSWER B) Glands with ducts

***Which of the following cells can be classified as an acidophil?
A) Gonadotropic cells
B) Corticotropic cells
C) Thyrotropic cells
D) Lactotropic cells
E) A and C are correct
F) B and D are correct - ANSWER D) Lactotropic cells

***The plasma membrane consists of the following elements except:
A) Transmembrane proteins
B) Peripheral proteins
C) Cholesterol
D) microfibers
E) A and C are correct
F) B and D are correct - ANSWER D) microfibers

, Histology NBME full questions and
Answers
***The glycocalyx can be defined as:
A) The masses of extracellular matrix
B) Basement membrane rich is collagen
C) Layer made of carbohydrate chains linked
D) A thin sheath of actin filaments located beneath the cell membrane
E) A and C are correct
F) B and D are correct - ANSWER C) Layer made of carbohydrate chains linked

***A process by which liquid droplets are ingested by living cells is:
A) Active transport
B) Phagocytosis
C) Pinocytosis
D) Facilitated diffusion
E) A and C are correct
F) B and D are correct - ANSWER C) Pinocytosis

***Cytoplasmic structures consisting of 2 central microtubules surrounded by 9
microtubule doublets were recognized as:
A) Cilia
B) Microvilli
C) Axoneme
D) Centrioles
E) A and C are correct
F) B and D are correct - ANSWER E) A and C are correct

***Which of the following has a rigid wall composed of 13 protofilaments strands?
A) Microtubule
B) Microfilament
C) Neurofilament
D) keratin
E) A and C are correct
F) B and D are correct - ANSWER A) Microtubule

***Which of the following phrases concerning endochondral ossification is/are correct:
A. It is the source of most of the flat bones
B. It is source of most long bones
C. It begins from mesenchymal condensation
D. Starts from the bone collar formation
E. A and C are correct
F. B and D are correct - ANSWER F. B and D are correct

***Which of the following phrases concerning epiphyseal cartilage is/are correct:
A. Is is also called epiphyseal plate
B. It is well vascularized