Histology Final Exam Done by:maha AbuAjamieh
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1 Histology Final Exam Done by:maha AbuAjamieh 1) Which of the following is the least valuable when distinguishing between bone and hyaline cartilage?? A- lacunae B-canaliculi C-lamella D-cell nest E- harversian canal 2) Which of the following is wrong about cardiac muscles: 1-lack intermediate filaments 2- cardiac cells are connected by gap junction 3- The presence of adherens junctions 4- None of the above Answer: 4 3) brush borders are associated with: 1- stereocilia 2- microvili Answer: 2 4) What is correct regarding dark and light skinned people. 1- Same number of melanocytes in people with dark and light skin with difference in their activity. 2- dark people have more melanocytes than lighter fellows. 3- Answer: 1 5) What is true regarding epithelium: A-loosely packed cells with great amount of ECM B-densely packed cells with small amount of ECM C-loosely packed cells with small amount of ECM D-densely packed cells with great amount of ECM E-none of the above Answer: B 6) What is the difference between Sebaceous glands and eccrine sweat glands? A- their location B- their secretions C- association with hair follicles
2 D- all of the above E-B+C Answer: D 7) A child sustains a (small) tear in torn his gastrocnemius muscle. Regeneration of this muscle will occur through; A- Differentiation of satellite cells B- fusion of damaged myofibers to form new myotubes C- hyperplasia of existing muscle fibers D- differentiation of fibroblasts to myblasts E- Dedifferentiation of muscle cells into myoblasts (Note : the aforementioned muscle is skeletal) Answer; A 8)One of the following is wrong about thick skin: 1-doesn't have sebaceous glands 2- has one kind of sweat glands 3- its dermis is thicker 4- lacks hair follicles 5- none of the above Answer: 3 9) Which of the following connects the epiphyseal plate to epiphysis? A- calcification and hypertrophy B- mitotic cells C-ossification zone D-resting cells E-none of the above Answer: D 10) What is wrong about triad: 1- T tubules are part of it 2- it is visible under LM 3- it plays a role in the initiation of muscles' contraction 4- it is located in the A-I junction 5- it has two terminal cisternae of SR Answer: 2 11) What is wrong about Elastic fibers? A- can be synthesized by smooth muscle cells B- characterised by the appearance of periodic striations C- yellow color in fresh tissue D- C and B E- A and C Answer: B 13)Which is wrong concerning spongy bone? A-formed only by intramembranous
3 B- found in non-weight bearing bones 14) What statement is wrong: A-Answer: motor unit composed of both white and red fibers 15)Meissner s corpuscle found in what layer of the skin? A- Answser: Dermal papilla 16)What are the similarities between osteoblasts and chondroblasts A- derived from mesenchymal cells B- precursors of osteocytes C- both found in lacunae D- 17) what is wrong about reticular fibers 1- are visible when H&E are used 2- we use silver impregnation to stain 3- are related to basement membrane 4- are thin and branched Answer: 1 (not sure) 18) what is correct regarding thin filaments A- Actin filaments shorten when muscle contracts B- only actin C- they are attached to the Z line by a protein called titin. D- present in H zone E- isotropic Answer: E 19)A tissue underlines a hollow organ and its functions are secretion and absorption, the tissue is? A-simple columnar with smooth muscle B- simple squamous with cardiac muscle C- simple squamous with smooth muscle D- transitional + skeletal muscle E- transitional + smooth 21) about simple squamous epithelium is found : A-urethra B-blood vessels C-oesophagus D-trachea Answer: B
4 22) sebaceous glands secretions are best described by: A- The contents are secreted by exocytosis. B- the apical cytoplasm is lost along with the secretory material. C- the rupture of the whole cell. Answer: C 23) Endochondral and intramembranous ossification have these similarities except both happen prenatally 2- formation of bone collar Answer:2 24) where could you find abundant keratohyalin granules? a-hyaline cartilage b- stratum granulosum c- stratum spinosum d-reticular Answer: b 25) what is correct about dense bodies in smooth muscles. Answer; correspond to z line in skeletal muscle 26)All of the following are smooth muscle features except: 1-fusiform in shape 2-single nucleus in center 3-has T tubules 4-lack troponin 5-connected with gap junction Answer: 3 27) What iis wrong about osteoclasts : Answer: Basophilic 28) All the following are correct except: Answer: collagen I is responsible for bone hardness 29) What is wrong about elastic cartilage: Answer: calcifies when aging. 30) A spongy bone is viewed under the microscope, it is formed only by intramembranous ossification, which of the following structures is not viewed A. Lamellar bone B. Osteoclast C. Non lamellar bone D. Osteoblasts E. Calcified cartilage Answer: E 34) What is correct about sarcomeres Answer: M line found in the middle A band
5 35) What is correct about intercalated discs: A- best seen in longitudinal section B- always found on z line C-A and B answer A 1) What is mainly found here? 1- fibrocytes 2- reticular fibers 3- elastic fibers 4- Answer: 2 -The arrow points at endomysium-
6 2) Identify the circled cell: Answer : plasma cell 3) All are true about this cell except: A- active in bone deposition B- found inside lacunae
7 4) What is wrong about this structure: 1- found in fetuses in large amounts 2- composed of one droplet of lipid 3- Multipotent 4- Heat Generation Answer:2 5) Which of the following is correct A- avascular B- highly vascularised C- nothing special about its blood supply
8 6) Identify Answer: ossification zone 7) Identify: Answer: Mast cells
9 8) The arrow points at: Answer: Basophilic cell 9) Where could you find this skin sample? A. Back skin B. Eyelid C. The palm of hand Answer: C
10 10) What is correct about these cells? A. These cells are connected to the basement membrane by hemidesmosomes, 11) What is the type of muscles? A. Skeletal muscle B. Smooth muscle C. Cardiac muscle
11 12) What is type of ossification? A. Intramembranous ossification B. Endochondral ossification (Flat bone)
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