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BIOSCI > Lecture 2 > Flashcards

Lecture 2 Flashcards

1
Q

What are the functions of the simple squamous?

A

Diffusion, Secretion (lube), Filtration

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2
Q

What is the main function of epithelial tissues?

A

Covering, Secretion, Receptors

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3
Q

What are the three sections of epithelium?

A

Apical, Lateral, Basal

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4
Q

Where are simple squamous epithelium located?

A

Bowman’s capsule (kidney), Insides of Cardiovascular and Lymphatic systems, alveoli, linings of blood vessels and heart. Eardrum tympanic membrane.

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5
Q

What are the subtypes of simple squamous?

A

Mesothelium (pericardial, pluera, peritonium), Endothelium (insides of heart and blood vessels)

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6
Q

What is the appearance of simple squamous?

A

Thin, Flat, like lots of fried eggs

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7
Q

What is the function of simple cuboidal tissues?

A

Absorption and Secretion

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8
Q

What is the appearance of Simple Cuboidal Epithelium?

A

Cuboidal or Hexagonal, Nuclei are positioned at the centre of

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9
Q

Where are simple cuboidal epithelium located?

A

Pancreas ducts, kidney tubules, secretory chambers of thyroid, anterior surface of eye lens, smaller ducts of many glands, ovaries surface

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10
Q

What is the function of Non Ciliated Simple Columnar Epithelium?

A

Absorption, Secretion/lubrication

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11
Q

What is the function of ciliated simple columnar epithelium?

A

Moving foreign particles, mucus and oocytes

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12
Q

What is the appearance of simple columnar epithelium

A

Rectangular or tall hexagonal, elongated nuclei are positioned near the base

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13
Q

What types of Epithelia have ciliated and non ciliated (microvilli) subtypes?

A

Simple arrangements only (Pseudostratified Columnar and Simple columnar)

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14
Q

Why is simple columnar epithelium more metabolically active than simple squamous?

A

It has more organelles/cytoplasm

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15
Q

Where are non ciliated simple columnar epithelium located?

A

Lines gut mucosa from stomach to anus, ducts of many glands, gallbladder

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16
Q

where are ciliated simple columnar epithelium located?

A

some bronchioles, uterine fallopian tube, central canal of spinal cord, brain ventricles

17
Q

Where are stratified cuboidal epithelium cells located?

A

Ducts of certain endocrine glands (mammary, sweat, salivary), parts of male urethra

18
Q

What is the function of stratified cuboidal epithelium?

A

Limited Protection and Secretion

19
Q

What is the appearance of stratified cuboidal epithelium?

A

Multiple layers of cuboidal epithelium

20
Q

What is the function of stratified columnar epithelium?

A

Protection, Secretion, Absorption

21
Q

Where are stratified columnar epithelium located?

A

Parts of male urethra, Anus, Pharynx, Conjunctiva of eye

22
Q

What type of epithelium is transitional?

A

Stratified

23
Q

What is the shape of transitional epithelium?

A

They’re larger and more rounded than normal cuboidal/columnar when tissue is not stretched and squamous when tissue is stretched

24
Q

What are the functions of transitional epithelium?

A

Volume control (stretching), Impermeability

25
Q

Where are Transitional Epithelium located?

A

Urinary bladder, Ureters, Proximal urethra

26
Q

What are the proteins involved in tight junctions?

A

Actin filaments, Claudins, Occludins, zona-occuldins type 1,2,3

27
Q

Which type of Epithelia can be keratinised?

A

Stratified Squamous

28
Q

What is the function of tight junctions

A

Forms a watertight seal which prevents ions and water from passing through

29
Q

What are the protein/fibres involved in gap junctions?

A

Connexons (6 connexins), Keratin filaments

30
Q

What is the function of gap junctions?

A

To allow a channel where substances can pass through

31
Q

What are simple glands?

A

Singular main duct (can have branches)

32
Q

What are the proteins involved in Adherens junction

A

Cadherins, Calcium ions, Catenins, Vinculin, Actin Filaments

33
Q

What is the function of Adherens Junctions?

A

Resist abrasive and shearing forces

34
Q

What are compound glands?

A

Multiple main ducts which are branched

35
Q

What are the proteins involved in Desmosomes

A

Cadherins, (Calcium ions), Desmoplakin, Keratin Filaments

36
Q

Tubular vs Acinar vs Tubuloacinar

A

Tube shaped (larger lumen)– Round shaped (smaller lumen) – both tube shaped and round shaped

37
Q

What is the function of desmosomes?

A

resisting abrasive and shearing forces (stronger than adherens)

38
Q

What are the proteins involved in Hemidesmosomes

A

Integrin, Laminin, Keratin filaments

39
Q

What is the function of Hemidesmosomes

A

Anchors the epithelium tissue to basement membrane

BIOSCI (21 decks)

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