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IBSS mod 3 > Lecture 5 Lab > Flashcards

Lecture 5 Lab Flashcards

1
Q

What is depicted by the areas highlighted below

A

Microvilli – brush border

Terminal web – only seen with EM. The web is a mat of filaments found below the apical surface of the cell. The microfilaments of the microvilli are anchored into the terminal web.

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2
Q

What is depicted by the boxed portion of the image

A

brush or striated border.

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3
Q

What is depicted by the boxed portion of the image

A

brush or striated border.

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4
Q

What is depicted in the image

A

Stereocilia

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5
Q

›What is depicted in the image

A

Stereocilia

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6
Q

Stereocilia

A

are actually long, branching microvilli. With LM, stereocilia look like wispy, spiky projections off the apical surface of the cells. Similar to microvilli , they contain a core of actin microfilaments. They are seen in certain parts of the male reproductive system.

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7
Q

What is depicted in the images

A

Cilia

C – cilium

Mv – microvillus

BB – basal body

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8
Q

What is this a cross section of and what is indicated by the arrows

A
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9
Q

What structures are depicted by the arrows

A
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10
Q

Basal infoldings

A

are found on the basal surface of a cell, adjacent to the underlying connective tissue. The folds are projections of the plasmalemma that invaginate into the cell cytoplasm, increasing surface area. Mitochondria are frequently found in the cytoplasm between adjacent folds. Basal infoldings are easiest to see at EM, although they are visible with LM as faint striations on the basal surface of the cell that run perpendicular to the base of the cell. In salivary glands, they are present in the striated ducts.

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11
Q

what is the pic depicting and what is shown by the arrows

A

Depicts: Basal infoldings

Red: Mitochondria

Blue: Plasmalemma

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12
Q

What is depicted in the image as well as what are the arrows pointing to

A

Basal infoldings

are visible with LM as faint striations on the basal surface of the cell that run perpendicular to the base of the cell. In salivary glands, they are present in the striated ducts.

Arrows= Serous acini

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13
Q

What is depicted by the image

A
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14
Q

What is shown in the image

A

Hemidesmosome

Half of a desmosome, found on the basal surface of the cell

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15
Q

what type of epithelium is depicted

A

Simple squamous epithelium

consists of a single layer of very flat cells. The cells are so flat that their nucleus may bulge above the level of their cytoplasm. The cytoplasm is extremely thin and attenuated.

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16
Q

what type of epithelium is depicted

A

Simple cuboidal epithelium

single layer of cube-shaped cells. Cells are as wide as they are tall. The nucleus is usually round and centrally located. Secretory units will also be formed by simple cuboidal epithelium. In the secretory units, however, the cells are not actually cubeshaped. They are usually shaped like a pyramid, with the base of the cell resting on the basement membrane at the periphery of the secretory unit and the apex of the cell abutting the lumen.

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17
Q

What type of epithelium is depicted

A

Simple columnar epithelium

single layer of columnar cells. The cells are taller than they are wide. The large nuclei are usually oval in shape and located near the base of the cell. A negative Golgi is frequently seen in the cytoplasm between the nucleus and the cell apex. A simple columnar epithelium may have a brush or striated border (microvillus border). Goblet cells are also sometimes present.

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18
Q

What type of epithelium is depicted

A

Pseudostratified columnar epithelium

single layer of cells of differing shapes. Their nuclei appear at different levels, so the epithelium appears layered when it is not (hence the term ‘pseudostratified’). The epithelium usually can be distinguished by the fact that the nuclei usually do not line up in distinct rows, as they do in other simple and stratified epithelia, so that the pseudostratified epithelium has a random or disorganized appearance. This type of epithelium is frequently associated with a ciliated border, and may have goblet cells.

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19
Q

What type of epithelium is depicted

A

Transitional epithelium (uroepithelium)

20
Q

Transitional epithelium (uroepithelium)

A

The distinguishing characteristic of this epithelium is the presence of the layer of domeshaped large umbrella cells on the luminal surface. The surface cells have a rounded apical surface. They often look as if they are bulging above the rest of the epithelium. The cells are also frequently binucleate. Basal cells are small and form a single layer that is in contact with underlying connective tissue. It contains stem cells. Several layers of intermediate cells are located between the basal and umbrella cells.

21
Q

What type of epithelium is depicted

A

Stratified squamous epithelium

This type of epithelium may be nonkeratinized (nuclei are found in all cell layers) or keratinized, which means it has a layer of dead cells on its luminal surface.

22
Q

What type of epithelium is depicted

A

Stratified squamous keratinized epithelium

23
Q

What type of epithelium is depicted

A
24
Q

What type of epithelium is depicted

A

Stratified cuboidal

epithelium is usually made up of only two layers of cells. Cells in both layers are cuboidal in shape.

25
Q

What type of epithelium is depicted

A

Stratified columnar epithelium

is made up of layers of cells, with the luminal (i.e. top) layer of cells columnar in shape.

26
Q

What type of epithelium is depicted and what structure is indicated by the arrows

A

Glandular epithelium

Acinus (acini – pl) – secretory unit in the shape of a sphere or ball. The lumen is in the center. The secretory unit is surrounded at its periphery by a basement membrane.

27
Q

What is depicted by the image

A

Mucous secreting units

(acini) Secretory cells forming the units are classified as simple cuboidal epithelium, although they are pyramidal in shape. The nuclei are flattened and located toward the basal surface of the cell. The cytoplasm is pale. The lumen of the unit is in the center, with the basement membrane surrounding the cells at the periphery

28
Q

What is depicted by the circled portion of the image

A

Serous secreting units (acini)

– similar to mucous secreting units, except the nuclei of the secretory cells are round. The nuclei are located toward the basal surface of the secretory cell. The cell cytoplasm stains pink because it is filled with secretory granules.

29
Q

What is depicted by the circled portion of the image

A

Serous demilune –

a crescent-shaped collection of serous secreting cells capping a mucous secretory unit.

30
Q

What is depicted by the image

A

Goblet cells are unicellular glands

31
Q

What is depicted by the image

A

Goblet cells are unicellular glands

32
Q

Goblet cells are unicellular glands

A

Goblet cells are usually found scattered in a simple columnar or pseudostratified columnar epithelium, although they are sometimes present in large numbers. The cells are shaped like a goblet. The cytoplasm, which contains a viscous secretion called mucin, looks like a pale teardrop. The nucleus is shaped like a triangle and is located at the base of the cell.

33
Q

Label the image

A
34
Q

Label the image

A
35
Q

Label the image

A
36
Q

Label the image

A
37
Q

Label the image

A
38
Q

label the image

A
39
Q

Label the boxed portion of the image

A

Simple cuboidal epithelium (thyroid gland)

40
Q

Label the boxed portion of the image

A

Transitional epithelium (uroepithelium)

41
Q

Label the boxed portion of the image

A

Stratified squamous epithelium

42
Q

What is depicted in the image

A

Higher mag. Stratified squamous epithelium

43
Q

Label the Different types of epithelium

A
44
Q

Label the boxed portion of the image

A
45
Q
A

IBSS mod 3 (10 decks)

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