1st Evals 2018 - Hx - Cell to Skin Flashcards Preview

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Flashcards in 1st Evals 2018 - Hx - Cell to Skin Deck (80)
1

1. The glycocalyx which forms a coating on the upper surface of the cell membrane of many cells is
made up of:
A. Protein molecules C. cholesterol
B. Phospholipid D.polyssacharides
molecules

D

2

2. Apolyribosome is made up of ribosomes that are connected together by a fine thread of:
A. DNA C. tRNA
B. mRNA D. rRNA

B

3

3. Which of the following cellular structures are enclosed by a unit membrane?
A. ribosomes C.zymogen granules
B. nucleolus D. Fat droplets

C

4

4. Lipochrome pigments are cellular inclusions that resulted from the action of:
A. peroxisomes C. both
B. lysosomes D. neither

B

5

5. Lysosomal enzymes are synthesized in:
A. Free ribosomes C. both
B.Attached ribosomes D. neither

B

6

6. Cell structures that are capable of replication because they contain DNA:
A.mitochondria C. ribosomes
B. centrioles D. A &B only

A

7

7. Which of the following cytoplasmic organelles can account for intense cytoplasmic eosinophilia of a cell?
A. ribosomes C. mitochondria
B. rER D. A &Bonly

D

8

8. Attached to its membranes are enzymes that are needed for the synthesis of cholesterol and phospholipids:
A.rER C. Golgicomplex
B.sER D. B & Conly

B

9

9. Zymogen granules come from the:
A. rER
B.Golgi complex
C. mitochondria
D. ribosomes

B

10

10. Residual bodies are the end products of:
A. heterophagy C. protein synthesis
B. autophagy D. A &B above

D

11

11. Microtubules are produced in the:
A. Golgi complex C.centrosome
B. rER D. nucleolus

C

12

12. Intermediate filaments that are present in muscle cells:
A. keratin C. vimentin
B. desmin D. B & Conly

D

13

13. Tubulin molecules comprise:
A.microtubules
B. microfilaments
C. desmin
D. all of the above

A

14

14. Site for production of tRNA:
A. nucleolus
B.euchromatin
C. heterochromatin
D. none of the above

B

15

15. A DNA sequence that codes for an rRNA is called a:
A. chromosome C.nucleolar organizer
B. gene D. Ribosomal genome

C

16

16. RNA on whose one end is attached a specific amino acid:
A.rRNA C. mRNA
B.tRNA D. all of the above

B

17

17. Which of the following components of the nucleus persists throughout mitosis?
A. nucleolus C.chromosomes
B. nuclear envelope D. Fibrous lamina

C

18

18. Cytoplasmic organelles that are involved in the oxidation of long-chain fatty acids that generate hydrogen peroxide as a by-product.
A. mitochondria. C.peroxisomes
B. lysosomes D. B &Conly

C

19

19. Bulk transport of material across a cell is called:
A. secretion C. regulated transport
B. phagocytosis D. transcytosis

D

20

20. The presence of numerous secretory granules in the apical region of the cell indicates that the cell releases its secretory products by:
A. endocytosis
B. regulated secretion
C. constitutive secretion
D. osmosis

B

21

21.The basal lamina where the basal surfaces of epithelial cells rest is a product of the:
A. Epithelial cells that comprise the epithelium
B.fibroblasts that are in the underlying connective tissue
C. both
D. neither

A

22

22. Form/s of simple squamous epithelium:
A. mesothelium
B. endothelium
C. respiratory epithelium
D. A &B above

D

23

23. An epithelium that consists of two layers of cells where the basal cells are cuboidal and the superficial cells are columnar is what type of epithelium?
A. Stratified Columnar Epithelium
B. Stratified Cuboidal Epithelium
C. Stratified Squamous Epithelium
D. Transitional Epithelium

A

24

24. The epithelium that lines the urinary bladder and urinary passages:
A. Respiratory epithelium C.transitional epithelium
B. endothelium D. pseudostratified epithelium

C

25

25. In the basement membrane, collagen type VII is present in the:
A.lamina rara externa C. Lamina densa
B.lamina rara interna D. Lamina fibroreticularis

B

26

26. An epithelium that consists of several layers of cells where the basal cells are cuboidal and the most superficial cells are flattened but nucleated is referred to as:
A. Stratified cuboid alepithelium
B. Transitional epithelium (distendedstate)
C.Nonkeratinized stratified squamous epithelium
D. Keratinized stratified squamous epithelium

C

27

27.Microtubules comprise the core of:
A.microvilli C. stereocilia
B.flagella D. B & Conly

B

28

28. A cell membrane that is common to adjoining cells is often present in which intercellular junction:
A.zonula adherens C. desmosome
B.zonula occludens D. Gap junction

B

29

29. Which intercellular junction forms a band that completely encircles the cell?
A. Zonula Adherens
B. Desmosome
C. Gap junction
D. A&C only

A

30

30. Connexons characterize:
A. Zonula adherens
B. desmosomes
C.gap junctions
D. A & C only

C

31

31. Contractile cells that are present in the alveoli and small ducts of many exocrine glands:
A. myoidcells C. goblet cells
B. pericytes D.Myoepithelial cells

D

32

32. A gland that has a branched duct and secretory units that are in the form of blind-ending tubes:
A.branched tubular gland
B.compound tubular gland
C. Mixed tubular gland
D. Compound branched tubular gland

B

33

33. TRUE of exocrine glands:
A. They deliver their secretion onto the surface epithelium
B. All have ducts.
C. They deliver their secretion into the blood or lymph.
D. A&B

A

34

34. Serous demilunes of Giannuzzi can be seen in:
A. serous glands C.mixed glands
B. mucous glands D. all of the above

C

35

35. Exocrine glands that release their secretion by exocytosis:
A.holocrine glands
B.merocrine glands
C. apocrine glands
D. none of the above

B

36

36. TRUE of hyaluronic acid that is present in connective tissue matrix:
A. It is the most abundant GAG in the ground substance.
B. It serves as a backbone to which proteoglycan molecules are attached to form proteoglycan complexes.
C. It does not have a sulfate side group.
D. All oftheabove

D

37

37. Connective tissue extracellular fibers that branch and anastomose:
A. Collagen fibers C. elastic fibers
B. Reticular D. B & Conly

D

38

38. The GAGs present in the intercellular matrix of connective tissue properare synthesized by:
A. fibroblasts
B. chondroblasts
C. muscle cells
D. all of the above

A

39

39. Cells that can synthesize tropoelastin:
A. fibroblasts C. mastcells
B. musclecells D. A &B only

D

40

40. Which of the following subunits of a collagen fiber has the biggest diameter?
A. microfibrils C.fibrils
B. tropocollagen molecules D. Procollagen molecules

C

41

41. Fibrillin is a component of:
A. elasticfibers B. Reticularfibers
C. elastic lamella(of blood vessels) D. A & C only

A

42

42. Of the connective tissue extracellular fibers, the ones that have the greatest tensile strength are those that are made up of:
A. elastin C. type II collagen
B.type I collagen D. type III collagen

B

43

43. Mesenchymal cells are the stem cells for the following cells, EXCEPT:
A. fibroblasts C. prefatcells
B. reticular cells D. mastcells

D

44

44. TRUE of both the mast cell and the basophil:
A. They arise from mesenchymal cells.
B.Their cytoplasmic granules contain histamine and heparin. C. They are capable of mitosis.
D. All of the above

B

45

45. Which connective tissue cells are referred to as signet ring cells?
A. fibroblasts C.adipocytes
B. mastcells D. plasma cells

C

46

46. Connective tissue macrophages are otherwise called:
A. Kupffer cells C. Langerhans cells
B. microglia D. Histiocytes

D

47

47. Connective tissue cells that are antigen-presenting cells:
A. Plasma cells C. fibroblasts
B. Mast cells D.macrophages

D

48

48. Which of the following connective tissue cells contain the most number of lysosomes?
A. Plasma cells C. fibroblast
B. Mast cells D.macrophages

D

49

49. Type of tissue that makes up tendons:
A.dense regular connective tissue
B. Dense irregular connective tissue
C. loose connective tissue
D. reticular tissue

A

50

50. Type of tissue that comprises the stroma of the liver and the lymphoid organs:
A.collagenous connective tissue
B.reticular tissue
C. Adipose tissue
D. elastic tissue

B

51

51. Cellular structure that is NOT present in neurons: A.lysosome
B.centriole
C. mitochondrion
D. A &B only

B

52

52. Which of the fibrillar elements that form the cytoskeleton of neurons are otherwise called neurotubules?
A. microfilaments
B. intermediate filaments
C. Microtubules
D. none of the above

C

53

53. Most neurons in the body are:
A. unipolar
B. Bipolar
C. pseudounipolar
D. multipolar

D

54

54. TRUE of dendrites:
A. They conduct impulse away from the cell body.
B. They do not possess Nissl bodies.
C.There is only one in a bipolar neuron.
D. All of the above

C

55

55. In the CNS,nerve fibers are NOT enveloped by:(see pp 67-68)
A. Neurilemmal sheath
B. Basal lamina
C. endoneurium
D. B&C

D

56

56. In the PNS,themyeline sheath of myelinated neurons is formed by:
A. Schwann cells
B. Oligodendrocytes
C. Satellite Cells
D. A&C

A

57

57. Which part of a chemical synapse is ALWAYS formed by a neuron?
A. presynaptic membrane
B. post synaptic membrane
C. both
D. neither

A

58

58. Neuroglial cells that are mostly found in the white matter of the brain and spinal cord:
A. Protoplasmic astrocytes
B. Fibrous astrocytes
C. oligodendrocytes
D. B&C

D

59

59. Neuroglial cells that surround the cell bodies of neurons in ganglia:
A. Schwann cells
B. Oligodendrocytes
C. satellite cells
D. A&C

C

60

60. CSF circulates in the space that is in between the:
A. periosteum of the cranium and the periosteal dura
B. meningeal dura and the subarachnoid membrane
C. subarachnoid membrane and the piamater
D. piamater and brain substance

C

61

61. Phagocytes in theCNS:
A. Protoplasmic astrocytes
B. fibrous astrocytes
C. ependymal cells
D. microglial cells

D

62

62. A collection of nerve cell bodies in the PNS is called a: A. nucleus
B. nuclear area
C. ganglion
D. funiculus

C

63

63. Connective tissue that envelops a nerve fascicle in the PNS:
A.perineurium
B. epineurium
C. endoneurium
D. myelin

A

64

64. Motor endplates are specialized junctions that are formed by motor neurons and:
A. skeletal muscle cells C. smooth muscle cells
B. Cardiac muscle cells D. Any of the above

A

65

65. The largest of the encapsulated nerve endings:
A. End bulb of Krause C. Meissner’s corpuscle
B.Vater-Pacinian corpuscle D. Ruffini‘s corpuscle

B

66

66. Skin layer or layers derived from endoderm:
A. epidermis
B. dermis
C. both
D. neither

D

67

67. TRUEof thin skin:
A. There is no stratum granulosum
B. There is no sweat gland
C. There is no hair follicle
D. A & Cabove

D

68

68. Intercellular bridges, which indicate the location of the desmosomes inLM preparations, canbe seen between the cells in which layer of the epidermis?
A. stratum granulosum C. stratum corneum
B. stratum basale D. stratum spinosum

D

69

69. The cells of which epidermal layer contain profillagrinin their cytoplasmic granules?
A. stratum granulosum C. stratum corneum
B. stratum basale d. Stratum spinosum

A

70

70. The epidermal layer that consists of a single layer of tall cuboidal cells:
A.stratum granulosum C. Stratum lucidum
B.stratum basale D. Stratum spinosum

B

71

71. True of Langerhan's cells in the skin.
A.They are of antigen-presenting cells
B. They contain membrane-bound granules called keratohyaline granules
C. They are modified keratinocytes
D. All of the above

A

72

72. Melanocytes are present in the  .
A. epidermis
B. hairmatrix
C. nail matrix
D. A &B above

D

73

73. TRUE of keratinocytes
A. They comprise 85% to 95% of the cells in the dermis
B. They synthesize melanin
C.They are responsible for the renewal of the epidermis
D. All of the above

C

74

74. Made up of loose connective tissue:
A.dermal papillae
B. Epidermal ridges
C. reticular layer of dermis
D. all of the above

A

75

75. Histologic layer that is made up of dense irregular connective tissue:
A.papillary layer ofdermis
B.reticular layer of dermis
C. hypodermis
D. all of the above

B

76

76. TRUEof sebaceous glands:
A. They are compound branched alveolar glands.
B. They are apocrine glands.
C. They secrete sebum.
D. All of the above

D

77

77. Modified sweat glands in the eyelids:
A.meibomian glands
B.glands of Moll
C. Ceruminous
D. Mammary Glands

B

78

78. TRUEof the eccrine sweat glands:
A. They are merocrine glands.
B. Their primary function is to regulate body temperature.
C. They are simple coiled tubular glands.
D. All of the above

D

79

79. Myoepithelial cells are present in the acinian and small ducts of:
A. Eccrine sweat glands
B. Apocrine sweat glands
C. sebaceous glands
D. A &B above

D

80

80. TRUE of apocrine sweat glands:
A. They release their secretion by apocrine process.
B. They become functional at birth.
C.They are most numerous in the axilla.
D. B & Cabove

C