OHE Flashcards

1
Q

is branch of medical science that deals
with the study of minute structures of the tissues
and organs of the body.

A

Histology

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2
Q

is a branch of science that deals
with the study of microscopic structures of oral and
dental tissues.

A

oral histology

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3
Q

s a group of cells with intercellular substance
and tissue fluid, performing a definite function

A

Tissue

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4
Q

Group
of tissue performing special functions form the

A

organs

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5
Q

Aggregation of organs with definite
functions is known as

A

organ system

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6
Q

is a unit of living matter

A

Cell

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7
Q

cell is made

A

cytoplasm and nucleus

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7
Q

The external boundary of a cell is known as

A

plasma membrane or plasmalemma

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8
Q

Protoplasm inside the cell is the cytoplasm
containing 3

A

Organelles
Inclusion bodies
Amorphous matrix.

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9
Q

The most prominent organelle of the cell.

A

Nucleus

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10
Q

The nucleus is covered by a thin membrane known as

A

Nuclear membrane

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11
Q

Within the nucleus are the nucleolus and irregular masses known

A

chromatin material

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12
Q

chromatin material composed of

A

RNA

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13
Q

Suspended in ground substance known as

A

Karyolymph (nucleoplasm)

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14
Q

are membrane-bound cell organelles

A

Mitochondria

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15
Q

Chemical energy
produced by the mitochondria is stored in a small molecule called

A

Adenosine triphosphate (ATP)

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16
Q

shows various forms but the most common is in form of plates or lamellae or plates may dilate to bowl-shaped
structure (cisternae).

A

Golgi complex

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17
Q

Consist of minute fluid containing
membrane-bound tubules known as canaliculi, cisternae, or vesicles which may form sometimes a network (reticulum) or maybe in
form of granules (when free are known as ribosomes or polysomes)

A

Endoplasmic reticulum

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18
Q

When granules adhere to the outside membrane, they form

A

Rough surface endoplasmic reticulum (R E R)

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19
Q

tubules lacking
ribosomes are known as

A

smooth surfaced endoplasmic reticulum (S
E R).

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20
Q

are located close to nucleus in a
specialized area of the cytoplasm known as centrosome or cell
center.

A

Centrioles or Liposomes

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21
Q

these appear as two stained bodies

A

(in light microscope) or
hallow and tubular (in electron microscope).

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22
Q

are minute threadlike bodies of different lengths and
circumferences

A

Filaments

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23
Q

In ______the threadlike structures are
called tonofilaments of fibroblast, cytoplasmic fibril; nerve cells, neurofilaments, and of muscles, myofilaments

A

Mitosis

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24
Q

are single membrane-bound bodies containing
powerful digesting enzymes which assist the cell in destroying foreign particles or prevent the cell from overproducing by digesting some of the secretions.

A

Lysosomes

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25
Q

Are tiny, straight and tubular organelles often of different lengths.

A

Microtubules

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26
Q

The inclusion bodies are composed of 7

A

carbohydrates
protein,
pigments
crystalloids
fat
gas
and other metabolites or foreign
materials.

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27
Q

are packed materials to be secreted. These
are of various diameter and density but the most common form is spheroid

A

Secretion granules

28
Q

such as lipofuscin observed in muscles and nerve fibers; melanin in melanocytes; and hemoglobin in red blood corpuscles.

A

Pigments

29
Q

has variable size and closely associated with
mitochondria and built to function as an energy source

A

Lipids (fat)

30
Q

a storage form of glucose, is found
predominantly in liver and muscle cells as cytoplasmic granules. In
liver cells, these granules group together to form rosettes,
frequently in close proximity to smooth endoplasmic reticulum

A

Glycogen granules

31
Q

in electron microscope have been observed
to be associated with nucleus, endoplasmic reticulum,
mitochondria, golgi apparatus, lysosomes and with secretion
granule.

A

Crystalline particles

32
Q

Electron microscope have been observed to be associated with 6.

A

NUCLEUS
ENDOPLASMIC RETICULUM
MITOCHONDRIA
GOLGI APPARATUS
LYSOSOME
SECRETION GRANULE

33
Q

The organelles and inclusion bodies are suspended in a formless material known a

A

amorphous matrix

34
Q

holds the cells together and serves as a medium for the passing of nutrients and waste materials from capillaries.

A

Intercellular substance (fibrous or amorphous in nature)

35
Q

had been grouped based on the similarities of its
components, difference in form and number of cells, in types and amounts of intercellular substance and tissue fluid.

A

human tissue

36
Q

What is the four fundamental tissue?

A

Epithelial tissues (ectoderm)
Connective tissue (mesoderm)
Nervous tissue (ectoderm)
Muscular tissue (mesoderm)

37
Q

serves as surface covering of the skin and
mucous membrane and give rise to organs like glandular organs

A

Epithelial tissue

38
Q

What are the 5 glandular organs

A

pancreas
Liver
thyroid gland
salivary gland
dental organ.

39
Q

What are the 3 types of epithelial?

A

Simple epithelium
Pseudostratified columnar
Stratified epithelium

40
Q

cells are arranged in single layer.

A

Simple epithelium

41
Q

Scale-like of flat cell

A

Squamous

42
Q

Cube-shaped

A

Cuboidal

43
Q

Tall and narrow

A

columnar

44
Q

actually composed of single layer of
columnar cells arranged in such a way that the epitheliumappears to have several layers of cells, cause by difference in location of nuclei

A

Pseudostratified columnar

45
Q

consists of two or three more layers of
cells

A

Stratified epithelium

46
Q

What are the 6 Connective tissue (mesoderm)

A

Fibrous tissue in lamina propria
Loose, areolar tissue
Adipose tissue
Hemopoietic tissue
Cartilage
Bone

47
Q

has a large amount of
intercellular substance and few cells (tendons and ligaments).

A

Fibrous tissue in lamina propria

48
Q

The intercellular
substance are of 2 kind

A

Fibrillar – (with numerous fibroblasts)
Amorphous (shapeless, no differentiation)

49
Q

What is the 2 types of fibrillar

A

Collagen and elastic fibers

50
Q

with numerous fibroblast

A

Fibrilla

51
Q

shapeless, no differentiation

A

amorphous

52
Q

has small amount of cells, loose and thin
network of fibrous intercellular substance held together by a large amount of amorphous substance.

A

Areolar tissue

53
Q

is made up of areolar tissue and fat tissue.

A

fascia

54
Q

compose of fat cells held together by fibrous
intercellular substance. Fat cells maybe filled with fat so thatcytoplasm is pressed into a thin layer around the periphery of the cells and nucleus is pushed to the side of the cell.

A

Fat tissue

55
Q

produces blood cells as well as removing the
worn out blood cell from the blood stream.

A

Hemopoietic Tissue

56
Q

alcified connective tissue containing large amount of
dense fibrous intercellular substance (with amorphous substance)

A

Bone

57
Q

Cells with in the bone are the

A

osteocytes

58
Q

osteocytes found spaces known as

A

lacunae

59
Q

Tissue of central and peripheral nervous system

A

Nervous tissue (ectoderm)

60
Q

is composed of nerve cells called neuron capable of
reacting to stimuli (irritability) and of transmission of wave excitation or nerve impulse.

A

Nervous tissue

61
Q

the nervous system consists of 2 chief divisions

A

-Central nervous system (brain and spinal cord)
-peripheral nervous system (nerve of various organs of the body)

62
Q

Cells of the central nervous system are supported by

A

neuroglia (nerve glue)

63
Q

This tissue is composed of muscle cells which
are long and has been called as muscle fibers.

A

Muscular tissue

64
Q

what are the 2 types of Muscular tissue (mesoderm)

A

Smooth involuntary
Striated involuntary

65
Q

where the cytoplasm has cross striations

A

Striated muscle

66
Q

where the cytoplasm of the muscle
appear clear (walls of intestine, walls of blood vessel, and roots of hair)

A

Smooth muscle tissue

67
Q

contraction of muscle fibers maybe controlled by the
individual (arms, legs, other parts of the body, tongue, cheeks, lips and soft palate).

A

Voluntary muscles (skeletal muscle)

68
Q

contraction of its fibers is not under the control of
the individual’s will.

A

Involuntary muscle (cardiac muscle)