Tissues Flashcards

1
Q

Function of epithelial tissue

A

covers surfaces and separates compartments

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2
Q

3 types of cell-cell junctions

A

desmosomes
tight junctions
gap junctions

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3
Q

cell- ECM junction

A

hemidesmosomes

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4
Q

what do desmosomes do

A

provide firm anchorage

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5
Q

what do tight/ occluding junctions do

A

seal intracellular spaces

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6
Q

what do gap junctions do

A

allow for cell-cell communication

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7
Q

3 types of simple epithelial

A

squamous - thin for easy diffusion
columnar -when ciliated, move mucus
cuboidal- perform secretion and absorption

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8
Q

where is simple squamous epithelial found

A

alveoli and capillaries

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9
Q

where is simple cuboidal epithelial found

A

lining of nephrons

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10
Q

where is simple columnar epithelial found

A

lining of digestive tract

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11
Q

3 types of stratified epithelium

A

squamous - thick, and layers can de sloughed off to allow new growth
columnar - protection and secretion
cuboidal -protection

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12
Q

where is stratified squamous epithelial found

A

epidermis

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13
Q

where is stratified cuboidal epithelial found

A

ducts of sweat glands

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14
Q

where is stratified columnar epithelial found

A

pharynx

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15
Q

describe the epithelial componenets of the liver

A

hepatocytes
arranged in rows between blood vessels
multiple functions including secretion
support epithelial cells line blood vessels and bile ducts

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16
Q

describe the epithelial components of the kidney

A

epithelial cells arranged into nephrons
multiple functions including filtration of the blood, partial absorption of filtrate
support cells blood vessels and renal pelvis which receives toxic urine

17
Q

what are the consequences of abnormal function pf covering and lining epithelial

A

over/under proliferation
over/under secretion
loss of ciliary beat

18
Q

define the term gland

A

collections of multi or single cellular secretory epithelial

19
Q

endocrine glands

A

secrete into blood, e.g. adrenal cortex

20
Q

exocrine glands

A

secrete to the surface e.g. sweat glands

21
Q

forms of exocrine glands

A

simple

  • tubular
  • acinar

compound
-tubuloacinar

22
Q

consequences of abnormal glandular function

A

over production- pituitary giantism

under production- pituitary dwarfism

23
Q

define connective tissue

A

tissue which provides general structure, mechanical strength, space filling and physical and metabolic support for tissues

24
Q

4 types of connective

A

fibres
ground substance
tissue fluid
loose connective tissue

25
Q

what are fibres

A

collagen
makes up 30% of body weight
flexible but inelastic with great tensile strength
19types

26
Q

elastic fibres

A

stretch to 1.5x length and return to original shape tho can be overstretched
microfibrils and amorphous component
found in sheets
yellow in colour

27
Q

what is ground substance

A

proteoglycans
hyaluronic acid
glycoproteins

28
Q

what is loose connective tissue

A

fixed cells - fibroblasts, macrophages, adipocytes, mast cells
transient cells- white blood cells

29
Q

consequences of abnormal connective tissue function

A
  • blood/bone marrow = leukaemia
  • loose/dense = loss/abnormal fibres
  • cartilage = tare
  • bone= osteoporosis