Histology Final Flashcards

1
Q

expulsion of materials out of the cell
by fusing of a vesicle membrane with the cell
membrane

A

Exocytosis

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2
Q

uptake of materials into the cell

A

Endocytosis

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3
Q

Cell drinking

A

Pinocytosis

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4
Q

Cell eating

A

Phagocytosis

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5
Q

Composed of a phospholipid bilayer and proteins

A

Cell membrane

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6
Q

act as diffusion regulators.

A

phospholipids

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7
Q

Clear liquid enclosed in the cell by the cell’s membrane.

A

Cytoplasm / cytosol

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8
Q

are metabolically active specialized structures within the cell

A

Organelles

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9
Q

Largest, densest organelle

A

Nucleus

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10
Q

Present in all cells except mature red blood cells and blood platelets.

A

Nucleus

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11
Q

Form of DNA

A

Chromatin

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12
Q

a double layered membrane

A

Nuclear envelope

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13
Q

consists of parallel membrane-bound channels.

A

Endoplasmic Reticulum

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14
Q

“highway system for the cell”

A

Endoplasmic Reticulum

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15
Q

Primary function: modification, storage,
segregation and transport of proteins that the cell manufactures.

A

Endoplasmic Reticulum

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16
Q

This organelle can be classified as rough or smooth.

A

Endoplasmic Reticulum

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17
Q

Contains ribosomes on its outer surface

A

Rough ER

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18
Q

particles composed of protein and RNA, which synthesize protein

A

Ribosomes

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19
Q

“protein factories”

A

Ribosomes

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20
Q

Contains enzymesinvolved inmanufacturing
various lipid molecules and steroid hormones

A

Smooth ER

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21
Q

“Chemical processing and packaging center

A

Golgi apparatus

22
Q

Second largest organelle

A

Golgi apparatus

23
Q

Function: sorts, condenses, packages, and delivers proteins from the RER.

A

Golgi apparatus

24
Q

“Powerhouse of the cell”

A

Mitochondria

25
Q

Releases energy from food molecules and transform energy into ATP

A

Mitochondria

26
Q

“Sewer system” of the cell

A

Lysosome

27
Q

Membranous sacks produced by the Golgi
Apparatus

A

Lysosomes

28
Q

Delicate, threadlike, microscopic structures of
specialized protein, arranged in meshwork of bundles.

A

Microfilaments

29
Q

Responsible for cell motility

A

Microfilaments

30
Q

Long slender tubes that maintain the shape of
the cell.

A

Microtubules

31
Q

Various types of thicker, threadlike microscopic structures within the cell.

A

Intermediate filaments

32
Q

Metabolically inert substances that are transient over time in the cell

A

Inclusions

33
Q

Closes intercellular space between cells by fusing cell membranes together & prevents the movement or loss of fluid.

A

Tight junction

34
Q

Bind cells together by creating “spot welds”
between adjacent membranes.

A

Desmosomes

35
Q

Attachment of cell to an adjacent non-cellular surface.

A

Hemidesmosomes

36
Q

This junction allows gingival tissue to adhere to the tooth surface by epithelial attachment

A

Hemidesmosomes

37
Q

Form tubular channels between
cells that allow substances to be exchanged

A

Gap junctions

38
Q

LIFE CYCLE OF A CELL

A
  1. Interphase (DNA replication)
  2. Mitosis (Cell Division)
  3. Cytokinesis (Cytoplasmic Division)
  4. Differentiation
39
Q

Stage in the life cycle when a cell grows and forms new organelles.
• Period of growth and activity between mitoses.
• Consists of 3 phases:
– G1 phase: the initial resting phase of cell growth.
– S phase: DNA replication (chromatin and
centrosome replication)
– G2 phase: the second resting phase of cell
growth.

A

Interphase

40
Q
A

Interphase

41
Q

The stages of mitosis include:

A
  1. Prophase
  2. Metaphase
  3. Anaphase
  4. Telophase
42
Q
A

Prophase

43
Q

What stage?
The nuclear membrane and nucleolus disappear

  1. Prophase
  2. Metaphase
  3. Anaphase
  4. Telophase
A
  1. Prophase
44
Q

What phase?
Chromosomes become arranged midway between the centrioles.

  1. Prophase
  2. Metaphase
  3. Anaphase
  4. Telophase
A

Metaphase

45
Q
A

Metaphase

46
Q
A

Anaphase

47
Q

Chromatids migrate to opposite poles by the
mitotic spindle

A

Anaphase

48
Q
A

Telephase

49
Q

Process by which all cytoplasmic components of the cell are divided into two identical daughter cells following mitosis.

A

Cytoplasmic division/ cytokinesis

50
Q

___________ is the process by which a less specialized cell becomes a more specialized cell type

A

Differentiation

51
Q

3 periods of prenatal development

A
  1. Preimplant period 1st trimester
  2. Embryonic period 1st
  3. Fetal period 2nd & 3rd trimester