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Histo Final Exam > 301-350 > Flashcards

301-350 Flashcards

1
Q
  1. Fibrocartilage is characterized at the light microscopic level by:
A

collagenic fibers

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2
Q
  1. It is believed that worn out red cells are normally destroyed in the spleen by:
A

Phagocytosis

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3
Q
  1. Blood platelets are products of:/
A

bone marrow.

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4
Q
  1. Bacteria are frequently ingested by://
A

phagocytosis

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5
Q
  1. What are the bundle of longitudinal contractile elements within a muscle cell called://
A

Myofilaments

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6
Q
  1. The microscopic structure of certain parts of the temporomandibular joint differs from corresponding parts of most other articulations of the human body. One such difference is that the articulating surfaces of the temporomandibular joint are://
A

hyaline cartilage

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7
Q
  1. The periodontal ligament is composed chiefly of://
A

It mainly comprised of structurally aligned collagen fibers along with fibroblasts, epithelial cells, osteoblasts, cementoblasts, and mesenchymal stem cells.

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8
Q

.308All of the following are associated with cartilage tissue except//..

A
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9
Q

309 Chondrocytes receive their nutrition via://

A

chondrocytes must be nourished by slow diffusion from blood vessels located in the fibrous layer of the perichondrium.

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10
Q
  1. The most common cell in connective tissue proper is the:
A

Fibroblast

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11
Q
  1. The presence of which one of the following characteristics is of least value in distinguishing bone from hyaline cartilage?://
A

Canaliculi

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12
Q
  1. Which one of the following cells would be best for the study of lysosomes?:
A

WBCs

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13
Q
  1. Heparin is produced by://
A

basophils and mast cells

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14
Q

314 The most common amino acid of collagen(ic) fibers is:

A

glycine, proline or hydroxyproline.

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15
Q

315 All of the following have ribosomes attached to them except:/

A
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16
Q

316 Which one of the following parts of a cell lacks a bounding membrane?:

A

Ribosomes, Cytoskeletal structures, Centrioles, Basal bodies, Cilia and flagella, nucleolus.

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17
Q

In 317 tracellular digestion is a chief function of the://

A

Lysosomes

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18
Q
  1. Which one of the following structures is visible in the light microscope?:
A

cell walls, vacuoles, cytoplasm, chloroplasts, nucleus and cell membrane, mitochondria.

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19
Q
  1. The basal body of a cilium has a tubular filament arrangement which is identical to the pattern found in://
A

Centrioles

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20
Q
  1. The electron dense layers of cell membranes are biochemically identified as:
A

Biochemically, the cell membrane is composed of phospholipids, which have a hydrophilic head and
hydrophobic tails.

21
Q
  1. Which one of the following junctions is characterized by the fusion of the outer leaflets of the cell membranes of adjacent cells?://
A

zonula occludens (tight junction

22
Q

322.
.
Cytoplasmic basophilia is characteristic of cells that:/

A

increased cell metabolism, which may either point to an increased reactivity of mature cells or to an increased amount of immature cells in the peripheral circulation or Morphologic changes in monocytes, lymphocytes, and thrombocytes include cytoplasmic basophilia, vacuolation, and bleb formation (i.e., constriction of vesicles from the cell membrane)

23
Q

The epithelium of the gallbladder is composed of :/

A

Simple columnar epithelium

24
Q
  1. In humans, the lining epithelium of the esophagus is:
A

stratified squamous epithelium non keratinised

25
Q
  1. Endothelium and mesothelium form cellular membranes which have the same histologic structure as://
A

Simple squamous epithelium

26
Q

Which one of the following epithelia is least common?://

A

Most possibly stratified columnar epic.

27
Q

The broadest basis for classifying epithelium into subgroups is:

A

lining or glandular

28
Q

Regarding simple columnar epithelium which statement is least descriptive?:

A
29
Q

Which of the following features is NOT characteristic of epithelium?:

A
30
Q

Glands are classified based on:/

A

Mode of pouring their secretions, shape, or having ducts or not.

31
Q

The most prominent component of a skeletal muscle cell is:

A

Skeletal Muscle cell or fibers

32
Q

Caveolae in smooth muscle cells are thought to be analogous to:/

A

T-tubules system in skeletal muscle fibers.

33
Q

The thick filaments of skeletal muscle fibers:

A

Myosin

34
Q

The exocrine cells secrete all of the following except://

A

Hormones

35
Q

The contractile element (component) of skeletal muscle is in the:

A

Sarcomere

Myosin n actin filaments

36
Q
  1. A node of Ranvier is://
A

small gaps of exposed axon, between the segments of myelin sheath, where action potentials are transmitted.

37
Q
  1. Most of the nuclei seen in a cross section of a peripheral nerve belong to:
A

Schwann cells and fibroblasts.

38
Q
  1. Pacinian corpuscles usually are considered to be most responsive to:/
A

deep pressure and high-frequency vibration

39
Q
  1. The cells that are responsible for forming myelin in the central nervous system are the://
A

oligodendrocytes

40
Q
  1. Nissl substance in nerve cell bodies is associated with:
A

RER or rosette of free ribosomes

41
Q
  1. A myelinated nerve has how many Schwann cells between two adjacent nodes of Ranvier?:/
A

1

42
Q
  1. The connective tissue investment seen with the light microscope around an individual muscle fiber of skeletal muscle is://
A

Endomysium

43
Q
  1. This cell is associated with osteoid secretion:
A

Osteoblast cell

44
Q
  1. Which microscope would be particularly useful for looking at living cell?:
A

light microscopes

45
Q
  1. In the formation of human placenta involved extraembryonic organ://
A

Chorion

46
Q
  1. Synkaryon is:/
A

A somatic hybrid cell in which chromosomes from two different parental cells are enveloped in a
single nucleus.

47
Q
  1. Normally most of the circulating white blood cells are://
A

Neutrophils

48
Q
  1. The glandular epithelium carries out the function://
A

produce and release different secretory products, such as sweat, saliva, breast milk, digestive
enzymes, and hormones, among other substances.

49
Q
  1. Epithelial tissues are mainly composed of://
A

cells laid together in sheets with the cells tightly connected to one another.

Histo Final Exam (8 decks)

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