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035. My MSK Test 1 > Epithelial Tissue > Flashcards

Epithelial Tissue Flashcards

1
Q

What are the 6 characteristics of epithelia tissue?

A

Characteristics: Cellularity, polarity, attachment, avascular, innervation and regeneration

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2
Q

What are the differences between the apical, basal, and lateral domains of epithelia tissue?

A

Basal: on basal lamina, anchors cell to connective tissue

Apical: Top part/lumen - exposed to air

Lateral: communicates with neighbor cells/attaches to them

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3
Q

What are the four types of specializations the apical domain can have?

A

Cilia, Flagella, microvilli, and stereocilia

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4
Q

Characteristics of microvilli? (3)

A

On apical domain, contain actin core

absorptive properties

increase surface area

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5
Q

Stereocilia/Stereovilli (3)

A

On apical domain, contain actin core, long and immotile

Increase surface area

restricted to epididymis and sensory cells of inner ear

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6
Q

Cilia (4)

A

On apical domain, microtubule core

Motile so wave stuff away from tissue

Primary immotile function as sensors

Establish left from right

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7
Q

Flagella

A

Motile cilia

Provide movement for sperm

very long

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8
Q

Occluding Junctions cell to cell (tight junctions/ zonula occludens)

A

encircle cells near apical surface.

more junctions= less permeability

contain occludins and claudins

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9
Q

Anchoring junctions

A

use cadherins to laterally adhese adjacent cytoskeletons

2 types: zonula adherens and macula adheres (desmosomes)

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10
Q

Zonula adherens

A

interact with network of actin filaments inside cell

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11
Q

Macula adherens (desmosomes)

A

interacts with intermediate filaments

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12
Q

What type of junction is fluid filled that connect apposed cells, mediates commincation and use connexin?

A

Gap junctions

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13
Q

What are focal adhesions?

A

they are junctions that anchor actin filaments to basement membrane using integrins

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14
Q

What type of intracellular junction anchors intermediate filaments to basement membranes using integrins?

A

Hemidesmosomes

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15
Q

What are the three types of epithelia cells?

A

Simple/ stratified

Squamous cell, cuboidal cell, columnar cell

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16
Q

Location and function of simple squamous epithelium?

A

lining of blood/ lymphatic (endothelium), serous membranes (mesothelium), aveoli in lungs

exhange, barrier, lubrication

17
Q

Location and function of simple cuboidal epithelium?

A

Kidney tubules, glands, ducts, bronchioles, covering ovaries

absorption, barrier, secretion

18
Q

Location and function of simple columnar epithelium?

A

Auditory tubes, uterus, stomach, gallbladder

absorption and secretion

19
Q

Location and function of pseudostratified columnar ciliated epithelium?

A

lining of nasal cavity, pharyn, trachea, bronchi

can contain globlet cell for mucous production

absorption, secretion, debris, and particulate movement

20
Q

Location and function of Urothelium (stratified epithelium)?

A

dome shaped cells: urinary bladder, ureters, urethra

barrier, distensivle property (can extend:))

21
Q

Location and function of nonkeratinized stratified squamous?

A

on apical surface flattened: oral cavity, pharynx, esophagus, anus, vagina, urethra, cornea

barrier and protection(for friction)

22
Q

Location and function of keratinized stratified squamous?

A

Epidermis of skin

water barrier and protection (apical layer cells dont have nucleus)

23
Q

Location and function of stratified cuboidal epithelium?

A

sweat glands & ducts, ovarian follicles, salivary gland ducts (DUCTS)

barrier and passageway

24
Q

What is the difference between stratified and simple epithelium cells?

A

stratified has 2+ layers of cells, simple only has one

25
Q

Location and function of basement membrane?

A

sheet of extracellular material under basal domain.

diffuses nutrients

26
Q

Difference between mucous and serous membranes?

A

Mucous: secretes mucus eg: respiratory system

Serous: internal cavities of the body: mesothelium

27
Q

What are the three types of exocrine glands?

A

Merocine, holocrine, apocrine

28
Q

Merocrine gland

A

secretion by membrane bound vesicles to apical surface, undergo exocytosis

29
Q

Holocrine (sebbaceous) gland

A

secretion accumulates in cell, apoptosis leads to cell debris released

30
Q

Apocrine Gland (sweat/mamillary)

A

release of apical portion of cell, surrounded by cytoplasm in plasma membrane

31
Q

Globlet cell (unicellular glands)

A

Mucus secreting cell found lining the intestines and respiratory tract

32
Q

What will seromucous, mucous, and serous acini look like under microscope?

A

Mucous: will be clear/white
Seromucous: half white, with a pink/purple ‘hat’
Serous: all fully colored purple/pink

035. My MSK Test 1 (10 decks)

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