Page 1 of 1: MCQ "3"

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Question 17. B LYMPHOCYTES

(a) turn into plasma cells and secrete immunoglobulin
True False

(b) are derived from cells which originate in the bone marrow
True False

(c) are the main cell type in the paracortex of lymph nodes
True False

(d) have receptors for antigen on their surface
True False

(e) can be seen as small lymphocytes in peripheral blood
True False

Question 18. THE THYMUS GLAND

(a) is divided into red and white areas
True False

(b) contains epithelial cells which interact with developing T cells
True False

(c) contains structures called Hassall's corpuscles which are vessels wrapped by surrounding macrophagic cells
True False

(d) undergoes involution after puberty
True False

(e) becomes replaced by adipose tissue in adult life
True False

Question 19. IN LYMPH NODES

(a) the germinal centers are found in the superficial cortex and are predominantly composed of B cells
True False

(b) the majority of lymphocytes gain entry via the high endothelial venules in the paracortex
True False

(c) antigen-presenting cells are not found in germinal centers but are concentrated in the paracortex
True False

(d) lymph enters the subcapsular sinus via afferent lymphatics
True False

(e) plasma cells are mainly concentrated in the medullary sinuses
True False

Question 20. IN THE HEART

(a) the main coronary arteries run in the epicardium
True False

(b) myocardial cells have central nuclei and are striated
True False

(c) the endocardium contains elastic tissue
True False

(d) the valves are composed of dense collagenous tissue and lack an endocardial covering
True False

(e) the percardial sac is lined by mesothelial cells
True False

Question 21. IN THE CARDIAC CONDUCTING SYSTEM

(a) cardiac contractions originate in the sinoatrial node
True False

(b) internodal atrial muscle carries signals directly to the left and right bundle branches
True False

(c) Purkinje fibers are indistinguishable from adjacent myocardial cells
True False

(d) the atrioventricular node gives rise directly to the bundle of His
True False

(e) the atrioventricular node is the only part of the conducting system composed of neuronal tissue
True False

Question 22. THE TRUE VOCAL CORDS OF THE LARYNX

(a) are covered by ciliated, columnar epithelium
True False

(b) are rich in lymphatics
True False

(c) are rich in capillaries
True False

(d) contain fibers of the vocal ligament
True False

(e) contain fibers of the vocalis muscle
True False

Question 22. THE TRUE VOCAL CORDS OF THE LARYNX

(a) are covered by ciliated, columnar epithelium
True False

(b) are rich in lymphatics
True False

(c) are rich in capillaries
True False

(d) contain fibers of the vocal ligament
True False

(e) contain fibers of the vocalis muscle
True False

Question 22. THE TRUE VOCAL CORDS OF THE LARYNX

(a) are covered by ciliated, columnar epithelium
True False

(b) are rich in lymphatics
True False

(c) are rich in capillaries
True False

(d) contain fibers of the vocal ligament
True False

(e) contain fibers of the vocalis muscle
True False

Question 22. THE TRUE VOCAL CORDS OF THE LARYNX

(a) are covered by ciliated, columnar epithelium
True False

(b) are rich in lymphatics
True False

(c) are rich in capillaries
True False

(d) contain fibers of the vocal ligament
True False

(e) contain fibers of the vocalis muscle
True False

Question 23. TYPE 1 PNEUMOCYTES

(a) are more numerous than Type 2
True False

(b) are joined to each other by tight junctions
True False

(c) are rich in mitochondria
True False

(d) have prominent surface microvilli
True False

(e) are very resistant to inhaled toxins
True False

Question 24. IN THE ORAL CAVITY

(a) the surface of the anterior two-thirds of the tongue is raised in a series of elevations called papillae
True False

(b) taste buds are found around the base of circumvallate papillae and in fungiform papillae
True False

(c) the tongue muscle is composed of complex interlaced pattern of non-striated smooth muscle fibers
True False

(d) the periodontal ligaments tether the teeth in the alveolar sockets of the mandible or maxilla
True False

(e) the floor of the mouth is lined by non-keratinized stratified squamous epithelium
True False

Question 24. IN THE ORAL CAVITY

(a) the surface of the anterior two-thirds of the tongue is raised in a series of elevations called papillae
True False

(b) taste buds are found around the base of circumvallate papillae and in fungiform papillae
True False

(c) the tongue muscle is composed of complex interlaced pattern of non-striated smooth muscle fibers
True False

(d) the periodontal ligaments tether the teeth in the alveolar sockets of the mandible or maxilla
True False

(e) the floor of the mouth is lined by non-keratinized stratified squamous epithelium
True False

Question 25. IN THE STOMACH

(a) acid is produced by chief (peptic) cells
True False

(b) enzyme-producing cells secrete pepsinogen
True False

(c) the mucosa in the body is characterized by long, straight, tubular glands containing acid-producing, enzyme-producing, mucin-producing and neuroendocrine cells
True False

(d) the mucosa in the pylorus has relatively few acid-producing cells compared to the body region
True False

(e) enteroendocrine cells secreting gastrin are concentrated in the cardiac region
True False

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