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68 Cards in this Set

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1.     Which of the following statements about cellular response are true; (P6,7)
A. Cells capable of division can respond to stress by hyperplasia or hypertrophy.
B. The increase in tissue mass due to hyperplasia after cell loss is caused only by proliferation of the remaining cells, but not by the development of stem cells.
C. Physiologic hyperplasia which increases the functional capacity of a tissue when needed is mentioned to the compensatory hyperplasia.
D. Hypertrophy takes place if the cellular population is capable of synthesizing DNA.
E. The increased cell size in hypertrophy is due to cellular swelling.
(1:A)
2. All of the following statements about cardiac muscle hypertrophy are true EXCEPT: (P7,8)
A. Both mechanical triggers and trophic triggers induce hypertrophy.
B. Both cardiac and skeletal _-actin increase muscle activity.
C. The _-myosin heavy chain is replaced by the _-myosin heavy chain, which leads to decreased myosin ATPase activity.
D. Ventricular ANF gene, which is down-regulated after birth, is reinduced.
E. Reinduced ANF serves to increase hemodynamic load.
(2:E)
3. All of the following statements about metaplasia are true EXCEPT: (P10,11)
A. Retinoic acid deficiency induces squamous metaplasia in the respiratory epithelium.
B. Refluxed gastric acid cause replacement of intestinal-like columnar cells by squamous epithelial cells.
C. Metaplasia is the result of a reprogramming of stem cells present in normal tissue.
D. Metaplasia is the result of a reprogramming of undifferentiated mesenchymal cells present in connective tissue.
E. Bone morphogenetic proteins induce chondrogenic or osteogenic expression in stem cells.
(3:B)
4. All of the following statements about cellular injury are true EXCEPT: (P11~15)
A. Reduced oxidative phosphorylation, ATP depletion, and cellular swelling due to ion concentration changes are all hallmarks of reversible cell injury.
B. Ischemic tissues are injured more rapidly than are hypoxic tissues.
C. Liver is the most susceptible (easily injured) to the ATP decrease by hypoxia.
D. Decreased ATP causes cellular influx of Na+ and efflux K+.
E. Morphologic consequence due to decreased pH is a clumping of nuclear chromatin.
(4:C)
5. Which of the following statement about oxidative stress is true?
(P16,17)
A. Inflammation-induced xanthine oxidase breaks down hydrogen peroxide.
B. Cu catalyzes free radical formation.
C. Most of the intracellular free iron is in the ferric state, which can catalyze hydroxyl ion production.
D. NO which is generate in inflammation act as a free radical by itself, and can be converted to non-reactive peroxynitrite anion.
E. Free radicals promote reduction of the protein backbone, resulting in protein fragmentation.
(5:B)
6. Which of the followings work as free radical scavenger? (P17)
1. Vitamin A
2. Vitamin C
3. Vitamin E
4. Glutathione reductase
5. Xanthine oxidase

A. 1,3
B. 1,2,3
C. 1,3,4
D. 1,2,3,5
E. All of above
(6:B)
7. Which of the following antioxidant enzymes are located in mitochondria? (P17,18)
1. Catalase
2. Manganese-superoxide dismutase
3. Cu-Zn-superoxide dismutase
4. Glutathione peroxidase

A. 1,2
B. 1,3
C. 2,3
D. 2,4
E. 3,4
(7:D)
8. Which of the following type of necrosis is most frequently seen by the hypoxic cell death within central nervous system?
(P21,22)
A. Coagulative necrosis
B. Liquefactive necrosis
C. Gangrenous necrosis
D. Caseous necrosis
E. Fat necrosis
(8:B)
9. Which of the following statement about cellular injury is true?
(P24, 25)
A. Ischemia-reperfusion injury occurs after resume of blood supply only when cells are irreversibly injured.
B. Some IgM antibodies prone to deposit in ischemic tissue, resulting ischemia-reperfusion injury after resume of blood supply.
C. Carbon tetrachloride (CCl4) act directly on target cells.
D. CCl4-induced injury is severe, but extremely slow in onset because this reaction have to pass through lipid peroxidation by produced free radical.
E. Acetaminophen is detoxified by cytochrome P-450.
(9:B)
10. Which of the following is correct order of CCl4-induced fatty liver; (P25)
1. Free radical production
2. Decreased apoprotein synthesis
3. Polysome detachment
4. Membrane damage to RER
5. Lipid peroxidation

A. 1→2→4→5→3
B. 1→5→2→4→3
C. 1→5→4→3→2
D. 2→3→1→5→4
E. 2→4→1→5→3
(10:C)
11. In apoptotic cells, endonucleases cleave DNA depending on; (P27)
1. Copper
2. Zinc
3. Magnesium
4. Calcium

A. 1,2
B. 1,3
C. 2,3
D. 2,4
E. 3,4
(11:E)
12. Which of the following factor bridge between cell-surface death receptor and mitochondria (; bridge between extrinsic and intrinsic pathway); (J of Vet Path)
A. FADD
B. Bid
C. PTPC
D. Caspase 8
E. Ced
(12:B)
13. Apoptotic cells are identified by special dye, Annexin V, binding to which of the following in their outer layer of membrane? (P27)
1. Phosphatidylserine
2. Thrombospondin
3. CD31

A. 1
B. 2
C. 3
D. 1,2
E. 1,2,3
(13:A)
14. Which of the following statements about lysosomal catabolism are wrong? (P32)
1. Lysosomal enzymes are synthesized in the Golgi apparatus and transferred to ER.
2. Phagolysosomes are formed in heterophagy, but not in autophagy.
3. In most of acquired lysosomal diseases, decreased internal pH of the lysosome result in inactivation of enzymes.

A. 1
B. 2
C. 3
D. 1,2
E. All of above
(14:E)
15. Which of the following cytoskeletal constituent is essential for cell division; (P34)
A. Actin
B. Myosin
C. Microtubules
D. Clathrin
E. Keratin
(15:C)
16. Which of the following statement about subcellular response is true; (P37-39)
A. Xanthoma is the visceral or subcutaneous benign neoplasia of adipocytes.
B. Russell body is the eosinophilic large distended lysosome due to excessively produced immunoglobulins.
C. In protein loosing renal diseases, reabsorption droplets of protein are seen in proximal renal tubles.
D. Hyaline changes happens only intracellularlly, but not extracellularlly.
E. Lipofuscin is the sign of free radical injury or lipid peroxidation, and injurious to the cell.
(16:C)
17. Which of the following statement about chaperon or ubiquitin is true; (P37,38, NFJM 2005)
A. Ubiquitin aid both in proper folding and transporting of protein.
B. In cystic fibrosis, mutation delays dissociation of a sodium channel protein from its chaperon, resulting in the increase of partially folded intermediates.
C. Ubiquitin marks for degradation by proteasome complex in lysosome.
D. The activation of the unfolded protein response leads to cell death by activating death receptor.
E. Ubiquitin is covalently linked to the target protein by ubiquitin ligase.
(17:E)
1. All the following statements regarding lysosomes are correct EXCEPT:
A) Small membrane-bound vesicles
B) Hydrolytic enzymes
C) Enzymes essential for intracellular digestion
D) Similar to peroxisomes
E) Play a role in energy metabolism
(1:E p.8, Peroxisomes also play a role in energy metabolism, but lysosomes do not.)
2. Diameter of the intermediate filaments are about:
A) 0.01 nm
B) 0.1 nm
C) 1.0 nm
D) 10.0 nm
E) 100.0 nm
(2:D p.8)
3. Extracellular matrix includes:
a. Proteoglycans
b. Adhesion glycoproteins
c. Collagens
d. Basement membranes

A) None
B) a
C) a, b
D) a, b, c
E) a, b, c, d
(3:E p.8)
4. All the following are general mechanisms of cell injury EXCEPT:
A) ATP depletions
B) Membrane damage
C) Decreased intracellular Ca2+
D) Distribution of cellular metabolism
E) Genetic damage
(4:C p.9, 10 Fig. 1-6, Increased intracellular Ca2+)
5. Ischemia causes in cells:
A) Increased both glycogen and pH
B) Increased glycogen and decreased pH
C) Decreased glycogen and increased pH
D) Decreased both glycogen and pH
E) No change either glycogen or pH
(5:D p.11 Fig. 1-8; ATP depletions → increased glycolysis → decreased both glycogen and pH)
6. All are characteristic cytomorphologic changes of irreversible cell injury EXCEPT:
A) Disruption of cell membranes
B) Nuclear condensation
C) Swelling of endoplasmic reticulum and detachment of ribosomes
D) Swollen mitochondria with amorphous densities
E) Lysosomal rupture
(6:C p.9, p.16 Fig. 1-13; Detachment of ribosomes from ER and chromatin clumping are reversible; myelin figures first appear during the reversible stage)
7. Cyanide toxicosis cause hypoxia due to:
A) Heart failure
B) Respiratory failure
C) Reduction of blood supply
D) Reduced transport of O2 in blood
E) Blockage of cell respiratory enzymes
(7:A p.10; Reduced transport of O2 in blood are results of anemia / carbon monoxide toxicity)
8. Na+-K+ ion pumps within cell membranes move:
A) 3Na+ into the cell and 2K+ out of the cell
B) 2Na+ into the cell and 3K+ out of the cell
C) 2Na+ into the cell and 2K+ out of the cell
D) 2Na+ out the cell and 3K+ into the cell
E) 3Na+ out the cell and 2K+ into the cell
(8:E p.12)
9. All the following cells highly vulnerable to hypoxia and cell swelling EXCEPT:
A) Oligodendrocytes
B) Endothelial cells
C) Cardiac myocytes
D) Distal renal tubular epithelial cells
E) Hepatocytes
(9:D p.15; Proximal renal tubular epithelial cells; In CNS, also neurons and astrocytes)
10. All the following are features of apoptosis EXCEPT:
A) Nuclear chromatin condensation
B) Nuclear chromatin fragmentation
C) Cytoplasmic budding
D) Cytoplasmic blebs
E) Phagocytosis
(10:D p.17 Fig. 1-14; Necrosis/oncosis: cytoplasmic blebs & digestion and leakage of cellular components)
11. Increased cytosolic Ca+ due to cell injury cause all of the following EXCEPT:
A) Activation of phospholipase A resulting in membrane damage
B) Activation of proteases resulting cytoskeleton and membrane damage
C) Activation of ADP phosphatase resulting in increased ATP
D) Activation of endonucleases resulting in chromatin degradation
E) Activation of phospholipase resulting in generation of arachidonic acid
(11:C p.18; Activation of ATPase resulting in decreased ATP)
12. All of the following are intracellular antioxidants that control free radical injury EXCEPT:
A) Superoxide dismutase (SOD)
B) Vitamin C
C) Ferritin
D) Ceruloplasmin
E) Cytochrome p450
(12:E p.19, 20; Also glutathione peroxidase, vitamins E and A, β-carotene, and catalase)
13. Fenton reaction is:
A) H2O2 + Fe3+ → OH + OH- + Fe2+
B) H2O2 + Fe2+ → OH + OH- + Fe3+
C) OH + OH- + Fe2+ → H2O2 + Fe3+
D) OH + OH- + Fe3+ → H2O2 + Fe2+
E) H2O2 + Fe2+ → H2O + O- + Fe3+
(13:B p.19 Fig. 1-16)
14. Match the following postmortem changes:
A) Rigor mortis
B) Algor mortis
C) Livor mortis
a. Gradual cooling of the cadaver
b. Contraction of muscles occurring after death
c. Gravitational pooling of blood to the down side of the animal
(14: A-b; B-a; C-c = hypostatic congestion, p.26)
15. Pseudomelanosis is the green discoloration by what?
A) Hemoglobin
B) Bile
C) Hydrogen sulfide (H2S)
D) Iron sulfide (FeS)
E) Melanin
(15:D p.27)
16. Which followings are associated with activation of the extrinsic pathway of apoptosis?
a. FasL
b. CD95
c. FLIP
d. TNFR1
e. FADD
f. Caspase-8
g. Caspase-9

A) a, b, d, e, f
B) a, b, d, e, g
C) a, c, d, e, g
D) b, c, d, e, f
E) All
(16:A p.30; CD95 = Fas; FLIP inhibitor of the extrinsic pathway by binding caspase-8)
17. Which followings are proapoptotic?
a. Bim
b. Bcl-2
c. Bax
d. Bcl-x
e. Bak

A) a, b, c
B) a, c, d
C) a, c. e
D) c, d, e
E) a, c, d, e
(17:C p.30)
18. In diabetes, glycogen is found which following cells?
a. Hepatocytes
b. Epithelial cells of renal proximal tubules
c. B cells of the renal Islets of Langerhans
d. Myocytes
e. Neurons

A) a
B) a, b
C) b, c
D) a, b, c
E) All
(18:D p.42)
19. Amyloid is:
A) 0.075- to 0.100- nm filaments
B) 0.75- to 1.00-nm filaments
C) 7.5- to 10.0-nm filaments
D) 75- to 100-nm filaments
E) 750- to 1000-nm filaments
(19:C p.45)
20. Match regarding amyloid:
A) AL amyloid
B) AA amyloid
C) Hereditary amyloidosis
D) β-amyloid
a. In the brains of aged dog
b. In Shar-Pei dogs and in Abyssinian

c. SAA from liver
d. Response to IL-1 and IL-6
e. Immunoglobulin light chains (λ- and κ-light chains)
(20: A-e; B-c,d; C-b; D-a, p.45-46)
21. All followings are correct regarding to gout in birds EXCEPT:
A) Uric acid and urates are the end products of purine metabolism
B) Uric acid and urates are eliminated as semisolid urates
C) Hypervitaminosis A can be a cause
D) High-protein diets can be a cause
E) Renal injury can be a cause
(21:C p.47, vitamin A deficiency)
22. All followings are correct regarding pseudogout EXCEPT:
A) Deposits of sodium urate crystals
B) Recognized in humans and in dogs
C) In humans, it is inherited as an autosomal dominant trait
D) Grossly, chalky white deposits in joints
E) Histologically, chronic reaction
(22:A p.47, Deposits of calcium pyrophosphate crystals)
23. All followings are correct regarding calcification in or under the skin EXCEPT:
A) Calcinosis cutis occur in dogs with hyperadrenocorticism
B) Calcinosis cutis has a preference for German shepherds and Great Danes
C) In calcinosis cutis, there is mineralization of dermal collagen, and epidermal and follicular basement membranes
D) Calcinosis circumscripta is considered to be dystrophic
E) Calcinosis circumscripta can be associated with repetitive trauma and at the site of buried sutures of polydioxanone
(23:B p.48, Calcinosis circumscripta is familial in German shepherds and Great Danes)
24. All of followings are causes of metastatic calcification EXCEPT:
A) Renal failure
B) Vitamin D toxicosis by ingestion of Cestrum diurnum
C) Vitamin E/selenium deficiency
D) Parathormone (PTH) and PTH-related protein associated with canine malignant lymphomas and canine adenocarcinoma of the apocrine glands of the anal sac
E) Destruction of bone from primary or metastatic neoplasms
(24:C, dystrophic calcification)
25. All of followings are correct regarding exogenous pigments EXCEPT:
A) Anthracosis is a subtype of pneumoconiosis
B) Carotenoid pigments are also called lipochrome pigments
C) Carotenoid pigments are fat-soluble pigments of plant origin and include the precursors of vitamin A, namely β-carotene
D) Yellow to orange-yellow fat discoloration by carotenoid pigments are commonly seen in Holstein cattle, sheep, goats, and cats
E) Tetracycline-based antibiotics administered during development of teeth and bone may cause yellow or brown discoloration
(25:D p.50, Fat discoloration with carotenoid pigments is common in horses, and Jersey and Guernsey cattle, and sometimes dogs; Holstein cattle, sheep, goats, and cats store little or no carotenoids and have white fat and clear serum)
26. All followings are correct regarding melanin EXCEPT:
A) Melanin is formed by the oxidation of tyrosine
B) Tyrosinase is a zinc-containing enzyme
C) Histologically the melanocytes appear normal in albino animals
D) Hyperpigmentation of skin is associated with chronic injury, endocrinopathies (hyperadrenalism), and in melanocyte neoplasms
E) Congenital melanosis occurs in the lungs and aorta (intima) of cattle, sheep, and pigs
(26:B p.51, Tyrosinase is a copper-containing enzyme)
27. All followings are correct regarding lipofuscin and ceroid EXCEPT:
A) Lipofuscin is a clear indicator of age of the cell, and ceroid is a pathological pigment, often associated with vitamin E deficiency
B) Lectin-binding histochemistry has shown differences between lipofuscin and ceroid from rats and humans
C) Intestinal lipofuscinosis is ceroid deposition in small intestine of dogs
D) Both lipofuscin and ceroid deposit intracellularly in lysosomes of postmitotic and stable cells
E) Lipofuscin deposition initially occurs infancy, but ceroid deposition occur anytime
(27:D p.53, Only lipofuscin; Lipofuscin deposits only intracellular, but ceroid deposits both intracelluolar and extracellular)
28. All followings are correct regarding hematogenous pigments EXCEPT:
A) Unoxygenated hemoglobin, hemosiderin, and bilirubin are produced normally but can accumulate excessively
B) Methemoglobin, carboxyhemoglobin, and hematin are pathological
C) In acute cyanide poisoning, cyanide binds to cytochrome oxidase, the enzyme in cell responsible for oxidative phosphorylation, and this results in paralysis of cellular respiration, and color of venous blood will be bright red
D) In carbon monoxide (CO) poisoning, the blood is a bright cherry red from the formation of carboxyhemoglobin. In nitrate poisoning, the blood and tissues are reddish-brown (chocolate brown) from the formation of methemoglobin, an oxide of hemoglobin.
E) Hematins, including formalin pigments and the excreta of parasites, such as Fascioloides magna (liver fluke) and Pneumonyssus simicola (lung mite), are positive for iron.
(28:E p.55, Formalin pigments are negative for iron when stained by Prussian blue reaction)
29. All followings are correct regarding Prussian blue reaction EXCEPT:
A) It is used to confirm iron
B) It is a chemical reaction
C) The end product is Prussian blue
D) Acid solution liberates ferric iron from hemosiderin
E) Ferric iron is reacted with oxygenerated ferrocyanide (colorless) to form ferric ferrocyanide
(29:E p.56, Potassium ferrocyanide)
1) All of the following are true about fibronectin, EXCEPT
A) Attachment cells to the connective tissue
B) Wound healing
C) Opsonized material for phagocytosis
D) Related to neoplastic formation
E) One of the structural fibrous protein
(1:E p.21; Robbins p.51 Fibronectin is adhesive glycoprotein. Structure fiber proteins are collagen and elastin.)
2) Which caspase is activated by granzyme B?
A) Caspase 2
B) Caspase 3
C) Caspase 8
D) Caspase 9
E) Caspase 10
(2:E p.42)
3) Which one is most important of the executioner caspase?
A) Caspase 2
B) Caspase 3
C) Caspase 8
D) Caspase 9
E) Caspase 10
(3:B p.42-43)
4) Which one is activated by caspase 3?
A) Caspase 8
B) c-myc
C) CAD
D) BAX
E) Apaf-1
(4: p.42, CAD: caspase-activated deoxyribonuclease)
5) Cytochrome P-450 located in
A) Cytoplasmic constituents
B) Peroxisomes
C) Plasma membrane
D) Endoplasmic reticulum
E) Mitochondria
(5:D p.57)
6) In Wilson’s disease in human and in a similar disease in some dog breeds, where is abnormal copper stored in the hepatic cells?
A) Lysosome
B) Peroxisomes
C) Plasma membrane
D) Endoplasmic reticulum
E) Mitochondria
(6:A p.58)
7) Selenium deficiency of cattle can cause muscle and myocardial necrosis, whereas Vit E deficiency in horse?
A) Muscle necrosis
B) Myocardial necrosis
C) Mortor neuron disease
D) Glycogen storage disease
E) Hepatic necrosis
(7:C p.58)
8) Xanthin dehydrogenase acts on hypoxanthine to generate oxygen-derived free radicals, where this enzyme locates?
A) Capillary endothelium
B) Myocytes
C) Hepatocyte
D) Platelets
E) Macrophages
(8:A p.60)
9) Which breed of dogs occur familial form of amyloidosis?
A) Shar-pei
B) German shepherd
C) Basenji
D) Great Danes
E) Siberian husky
(9:A p.73, Familial forms of amyloidosis occur in the shar-pei dog and the Abyssinian cat.)
10) Amyloid contains component other than the fibril protein, CHOOSE THREE
A) glycosaminoglycan
B) amyloid P component
C) apolipoprotein E
D) apolipoprotein B
E) fibronectine
(10:A,B,C p.73)
11) Which of the following are found in the inner membrane of the mitochondria?
1. Monoamine oxidase
2. Nucleoside diphosphokinase
3. ATP synthetase
4. Succinate dehydrogenase
5. Citrate synthetase

A) 1, 2
B) 2, 3
C) 3, 4
D) 4, 5
E) 3, 5
(11:C p.22 Table 2-1, 1:outer membrane; 2:intermembranou compartment; 5:matrix)
12) Lipofuscin represents accumulation in:
A) Primary lysosomes
B) Secondary lysosomes
C) Residual bodies
D) Mitochondria
E) Endoplasmic reticulum
(12:C p.25)
13) The protein found in coated pits is:
A) Actin
B) Tubulin
C) Desmin
D) Laminin
E) Clathrin
(13:E p26)
14) Directional movement of a cell primarily involves:
A) Actin
B) Tubulin
C) Desmin
D) Laminin
E) Clathrin
(14:B p.27)
15) Peroxisomes contain all except:
A) Nucleoid
B) Catalase
C) Superoxide dismutase
D) Urate oxidase
E) D-amino acid oxidase
(15:C p.28, Nucleoid - a structure often contained in peroxisomes but not in lysosomes)
16. Bcl-2 is the mammalian equivalent of which C. elegans apoptosis inhibitor:
A) CED-3
B) CED-4
C) CED-8
D) CED-9
E) CED-10
(16:D p.41, Bcl-2 = CED-9; Apaf-1 = CED-4)
17) Which of the following associates with cytochrome c and Apaf-1 to form the “apoptosome”:
A) Caspase-3
B) Caspase-4
C) Caspase-8
D) Caspase-9
E) Caspase-10
(17:D p.43)
18) Which of the following favor apoptosis:
1. Caspase-9
2. AIF
3. Puma
4. Bax
5. Cyclosporins

A) 1, 2, 3
B) 2, 3, 4
C) 1, 2, 3, 4
D) 2, 3, 4, 5
E) 1, 2, 3, 4, 5
(18:C, p.44, AIF: apoptosis-inducing factor; p. 250, Cyclosporin: drug which blocks production of IL-2)
19) Lipid peroxidation reactions are catalyzed by (2 answers):
A) Calcium
B) Copper
C) Iron
D) Magnesium
(19:B,C p.58)
20) Briefly, what is the pathogenesis of lipid accumulation in CCl4 liver toxicity?
(p.59, Lipid peroxidation → RER membrane damage → decreased protein synthesis → decreased apolipoprotein necessary to transport triglyceride from the hepatocyte → intracellular lipid accumulation)
21) Xanthine oxidase, a potentially important source of oxygen-derived free radicals, is not present in which species:
A) Cat
B) Cattle
C) Dog
D) Rabbit
E) Rat
(21:D p.59)
22) What is the name of an acidic membrane phospholipid that serves as a potential Ca-binding site and is also a receptor aiding in phagocytosis of apoptotic cells?
(p.69, Phosphatidylserine)