Histology Midterm Exam - TAIBAH University PDF

# TAIBAH UNIVERSITY ## Faculty of Medicine ### Department of Anatomy ## FIRST YEAR DENTISTRY ### HISTOLOGY: MIDTERM #### SESSION 1436-1437 H (2 #### Version #### TIME ALLOWED ## INSTRUCTIONS: 1. Write your name, computer (registration) number and exam version on the exam paper and answer sheet. 2....

# TAIBAH UNIVERSITY ## Faculty of Medicine ### Department of Anatomy ## FIRST YEAR DENTISTRY ### HISTOLOGY: MIDTERM #### SESSION 1436-1437 H (2 #### Version #### TIME ALLOWED ## INSTRUCTIONS: 1. Write your name, computer (registration) number and exam version on the exam paper and answer sheet. 2. Use HB-2 pencil. Please make your marks clear. 3. Each of the following questions has five options; one of these is either correct or incorrect (answer). Mark ONE answer ONLY by filling the proper CIRCLE in the answer sheet. ## QUESTIONS 1. The principal connective tissue cells are * A. Pericytes. * B. Reticular cells. * C. Fibroblasts. * D. Adipose cells. * E. Macrophages. 2. Which of the following cells has a signet-ring appearance? * A. Reticular cells. * B. Fibroblasts. * C. Plasma cells. * D. Macrophages. * E. Unilocular adipose cells. 3. Which of the following characterizes the nucleus of a plasma cell? * A. Segmented into many lobes. * B. Kidney-shaped. * C. S-shaped. * D. Clock face appearance * E. Horse shoe-shaped (bilobed). 4. All the followings regarding skeletal muscle fibers are true EXCEPT * A. Are cylindrical in shape. * B. Have acidophilic cytoplasm. * C. Have single nucleus. * D. Are striated. * E. Are surrounded by basal lamina. 5. In skeletal muscle fibers, sarcoplasmic reticulum in a special term for: * A. Muscle cytoplasm. * B. Rough endoplasmic reticulum. * C. Mitochondria * D. Actin and myosin filaments. * E. Smooth endoplasmic reticulum. 6. What is the dark band in skeletal muscle? * A. I band. * B. Z line. * C. A band * D. H band. * E. M line. 7. The connective tissue covering a muscle bundle is termed as: * A. Sarcolemma * B. Perimysium. * C. Endomysium. * D. Epimysium. * E. Sarcoplasm 8. Tendon is composed mainly of: * A. Parallel arranged elastic fibers. * B. Regularly arranged elastic fibers. * C. Irregularly arranged collagen fibers. * D. Dense regularly arranged collagen fibers. * E. Network of reticular fibers. 9. Which of the following is NOT correct about chondroblasts? * A. Are derived from mesenchymal cells. * B. They produce elastic fibers. * C. Responsible for appositional growth of cartilage. * D. Cartilage forming cells. * E. Found at the surface of the cartilage. 10. Formation of cell nests is the character of: * A. Fibroblasts. * B. Chondrocytes. * C. Chondroblasts. * D. Osteoblasts. * E. Osteocytes. 11. This diagram represents histological structure of .... Diagram: A cell with a nucleus and its surrounding cytoplasm. * A. Elastic cartilage. * B. Compact bone * C. Fibrocartilage. * D. Cancellous bone. * E. Hyaline cartilage. 12. All the following are FALSE regarding hyaline cartilage EXCEPT: * A. Surrounded by perichondrium except at articular cartilage. * B. It is opaque * C. Appears yellowish in color. * D. Contains collagen type I in its matrix * E. The matrix is calcified. 13. Regarding perichondrium, all are true EXCEPT * A. Has outer fibrous layer. * B. Has inner chondrogenic layers. * C. Provides nutrient to cartilage. * D. Provides attachment of cartilage to muscles and ligaments. * E. Helps interstitial growth of cartilage. 14. One of the following is FLASE regarding fibrocartilage: * A. Have perichondrium. * B. Present in intervertebral discs * C. Contains collagen type I in its matrix. * D. Appears white in color and opaque * E. Chondrocytes are arranged in rows. 15. One of the following statements is TRUE regarding the periosteum: * A. It lines the marrow cavity. * B. It has osteoclasts. * C. It contains osteogenic cells. * D. It is non-vascular. * E. It consists of one layer. 16. Regarding osteoblasts, all are true EXCEPT: * A. Are bone builder cells. * B. Derived from osteogenic cells. * C. Are large oval branched cells. * D. Have deep basophilic cytoplasm * E. Are dividing cells. 17. Which one of the followings is TRUE regarding osteocytes) * A. Form cell nests inside lacunae. * B. The cell processes of adjacent cells are connected by gap junctions. * C. Derived from blood monocytes. * D. Are dividing cells. * E. Have acidophilic cytoplasm 18. This diagram represents histological structure of.... Diagram: A cell with many lacunae containing osteocytes. * A. Cancellous bone * B. Hyaline cartilage * C. Compact bone * D. Fibrocartilage. * E. Dense regular collagenous tissue 19. Choose the TRUE STATEMENT regarding Haversian system: * A. It is the structural unit of cartilage. * B. Surrounded by perichondrium. * C. Formed of 4-20 concentric bone lamellae arranged around Haversian canal. * D. Its canal is filled with chondrogenic cells. * E. Consists of outer fibrous layer and inner cellular layer. 20. Which one of the followings is TRUE regarding osteoclasts? * A. Are bone building cells. * B. Are multinucleated cells. * C. Derived from osteogenic cells. * D. Have basophilic cytoplasm. * E. Present deep in the bone matrix. 21. Regarding Cancellous bone, all the following are true EXCEPT: * A. Has typical Haversian system. * B. It looks like sponge with many holes. * C. Formed of irregularly arranged bone trabeculae. * D. Contains active red bone marrow, * E. Has bone marrow spaces. 22. In intracartilagenous ossifications, one arrangement is CORRECT: * A. Zone of hypertrophy, proliferation, calcification, resting cartilage & ossification. * B. Zone of resting cartilage, proliferation, calcification, hypertrophy & ossification. * C. Zone of resting cartilage, proliferation, hypertrophy, calcification & ossification. * D. Zone of proliferation, resting cartilage, hypertrophy & ossification. * E. Zone of hypertrophy, proliferation, resting cartilage & ossification. 23. Sarcomere is defined as: * A. Smooth endoplasmic reticulum of the muscle. * B. The region of myofibril lying between two successive Z lines. * C. It is the structural and functional unit of nervous system. * D. Mitochondria of the muscle. * E. Plasma membrane of the muscle fiber. 24. Choose the CORRECT ANSWER regarding triad: * A. Formed of two T-tubules and one terminal cisternum. * B. Repeated at every Z line. * C. Formed of one T-tubule and two terminal cisternae. * D. Composed of actin, myosin and tropomyosin. * E. Located at the Z-M line junction. 25. Which of the following cells called big eaters: * A. Fixed macrophages * B. Lymphocytes. * C. Plasma cells. * D. Mast cells * E. Fibroblasts. 26. During allergic reactions, which of the following cells secret histamine? * A. Pericytes. * B. Fibrocytes. * C. Plasma cells. * D. Mast cells. * E. Fibroblasts 27. Which of the following connective tissue cells is most found along the long axis of blood capillaries? * A. Plasma cells. * B. Pericytes. * C. Lymphocyte. * D. Macrophages * E. Adipose cells. 28. What kind of connective tissue present during embryonic life? * A. Loose arcolar connective tissue. * B. Reticular connective tissue * C. Mesenchymal and mucous connective tissue * D. Adipose connective tissue. * E. Dense irregular connective tissue. 29. One of the following connective tissue cells is derived from blood monocytes: * A. Pigment cell. * B. Plasma cell. * C. Mast cell. * D. Fixed Macrophage * E. Fibrocyte. 30. Regarding collagen fibers all the followings are true EXCEPT: * A. Appear white in color. * B. Inelastic with great resistance to tension. * C. Affected by weak acids and alkali. * D. Are stained blue with H & E. stain. * E. Formed of tropocollagen proteins.