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Histology > Epithelium > Flashcards

Epithelium Flashcards

1
Q

General properties

A

Small intercellular space
On basement membrane
Avascular
Nerves pass

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2
Q

Origin

A

Ectoderm
Mesoderm
Endoderm

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3
Q

How nutrients enter

A

By diffusion through basement membrane

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4
Q

Stratified base layer

A

Columnar

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5
Q

Simple squamous

A

Flat centered nucleus
Gas exchange and viscera movement
Pluera, peritoneum, endothelium, alveoli, mesothelium

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6
Q

Cuboidal

A

Thyroid and kidney tubules
Secrete and excrete

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7
Q

Columnar

A

Basal oval nucleus
Intestine and stomach
Absorb and secrete

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8
Q

Ciliated columnar

A

Cilia on top
Uterus, fallopian tube

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9
Q

Psuedostratified columnar

A

Ciliated
Trachea, bronchi
Lubricate
Protect and transport

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10
Q

Non keratinised squamous layers, function

A

Oesophagus
Columnar-polyhedral-squamous

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11
Q

Kertinised squamous

A

Skin
Columnar-polyhedral-squamous dead- horny layer

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12
Q

Transitional

A

Urinary bladder
Columnar-polyhedral- dome shaped
2-3 layers when stretched

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13
Q

Glands

A

Exocrine(duct)
Endocrine(no duct), capillary surrounded by cells into blood(thyroid)

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14
Q

Unicellular gland

A

Goblet cell, mucus

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15
Q

Shapes of exocrine

A

Simple (tubular- alveolar) no branches
Compound (tubular- alveolar) brached

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16
Q

Mode of secretion of exocrine

A

Merocrine( mere part removed) pancrease
Apocrine( top section lost) milk
Holocrine(whole cell lost)sebaceous glands

17
Q

Apical surface

A

Cilia hairlike processes on cell surface
Mucus/respiratory/uterus (movement)

Microvilli cytoplasmic processes surrounded by membrane and glycocalyx (S.A) Crin and myosin core
Small intestine/ kidney tubules

Stereocillia , non motile microvilli (S.A)
Epididemis, generates hearing signals

18
Q

Microvilli+glycocalyx

A

Brush border

19
Q

Lateral and basal surface

A

Tight junctions (prevent passage)

Desmosomes connect cells (cadherens, keratin intermediate, cytoplasmic protein plaque)
Cardiac
Hemidesmosomes attach to basement membrane
Gap junctions channels, cardiac, ions sharing, depolarisation wave, smooth muscle

20
Q

Clinical 2

A

Metaplasia, transformation of one tissue type to another in response to injury.
Reversible if injury can be removed
Respiratory= psuedostratified»stratified squamous

Blistering
Autoantibody formation, disrupts desmosomes, affecting basement membrane in area

21
Q

Proximal convoluted tubule

A

Simple cuboidal

22
Q

Mesothelium in lung is

A

pleura

23
Q

Transitional epithelium characteristics

A

Binucleated , dome shaped top layer

24
Q

Intestinal glands are..

A

Simple tubular

25
Q

Basement membrane parts

A

Basal lamina
Reticular lamina

26
Q

Where is mesothelium

A

Pleura
Peritoneum

27
Q

Microvilli core

A

Actin microfilaments

28
Q

Stereocillia

A

Long non motile microvilli
Epididemis>increases s.a
Inner ear>generate hearing signals

Histology (19 decks)

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