Block 9 Flashcards

(61 cards)

1
Q

acute

A

recent
rapid onset
likely short duration

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2
Q

chronic

A

persistent

longstanding

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3
Q

risk factor

A

confers increased risk of disease development

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4
Q

predisposition

A

increased susceptibility to developing disease

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5
Q

pathogenesis

A

the mechanism resulting in clinical disease

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6
Q

premalignant

A

something that will probably transform into invasive malignancy

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7
Q

aetiology

A

the cause of the disease

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8
Q

disease

A

consequences of failed homeostasis

has potential to impair function

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9
Q

disease mechanism

A

the way in which homeostasis is disturbed

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10
Q

primary disease

A

arises spontaneously

not associated with or caused by previous disease or injury

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11
Q

secondary disease

A

follows and result from an earlier disease, injury or event

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12
Q

benign tumour

A

uncontrolled focal proliferation of well differentiated cells

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13
Q

malignant tumour

A

cancerous
invasive
has metastatic potential

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14
Q

types of necrosis

A
  • coagulative
  • colliquative / liquéfaction
  • caseating
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15
Q

types of nuclear morphology

A
  • pyknosis
  • karyolysis
  • karyorrhexis
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16
Q

karyhorrhexis

A

the destructive fragmentation of the nucleus of a dying cell whereby its chromatin is distributed irregularly throughout the cytoplasm

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17
Q

pyknosis

A

the irreversible condensation of chromatin in the nucleus of a cell undergoing necrosis or apoptosis (followed by karyorrhexis)

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18
Q

karyolysis

A

dissolution of cell nucleus, particularly during mitosis

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19
Q

hyperplasia

A

increase in cell number

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20
Q

hypertrophy

A

increase in cell size

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21
Q

atrophy

A

decrease in size and number of cells

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22
Q

metaplasia

A

conversion of one type of differentiated tissue into another tissue type

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23
Q

dysplasia

A

abnormal cytological appearance and tissue architecture

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24
Q

transdifferentiation

A

one cell type converting into another

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25
hydrostatic pressure
drives fluid out of blood vessels and into other tissues (under physiological conditions)
26
colloid osmotic pressure
a function of protein concentration | pulls fluid back into blood vessels from tissues (under physiological conditions)
27
oedema
abnormal increase of fluid in interstitial tissue space
28
causes of oedema
- increased hydrostatic pressure - decreased colloid osmotic pressure - lymphatic obstruction - sodium retention - inflammation
29
haemorrhage
extravasation of blood due to vessel rupture
30
arterial thrombus
platelet-rich mass formed within arterial system
31
venous thrombus
fibrin- and erythrocyte-rich mass formed within venous system
32
embolism
solid, liquid or gaseous mass carried in the blood to a site distant from the point of origin
33
hyperaemia
an adaptive process involving an increase in blood volume in the microvasculature of a specific tissue in response to a change in the environment
34
congestion
- a maladaptive process involving an increase in blood volume in the microvasculature of a specific tissue due to impaired venous return from the area - can be due to physical obstruction or physical insufficiency
35
shock
systemic hypoperfusion resulting in hypotension, cellular dysoxia, increased anaerobic respiration and lactic acidosis
36
types of shock
- cardiogenic - hypovolaemic - distributive / vasodilatory - obstructive
37
types of distributive / vasodilatory shock
- anaphylactic - neurogenic - septic
38
liquid-filled dermal lesions
- blister - vesicle - bulla - pustule
39
solid dermal lesions
- papule - plaque - nodule - wheal
40
dermal lesions of altered colour
- macule - patch - naevus - erythema
41
dermal scaling
shedding of cornfield layer | sometimes due to imbalance between production and loss
42
dermal callus
hyperplasia of epidermis following pressure or friction
43
dermal erosion
loss of superficial epidermis
44
dermal ulcer
loss of epidermis and papillary dermis
45
bruising
extravasation of blood into dermis
46
process of wound healing
haemostasis > inflammation > fibroplasia > epithelialisation > remodelling
47
virus
obligate intracellular parasite
48
nucleocapsid
viral genome contained in a protein capsule
49
virion
infective viral particle
50
naked enveloped viruses
- e.g. rotavirus, norovirus - stable in face of environment stress - kills host cell to spread so spreads easily - generally survives the gut
51
enveloped viruses
- e.g. HIV, ebola, influenza - must stay wet to remain infectious - very sensitive to detergent because the envelope is a membrane - can spread via budding instead of host cell lysis
52
types of viral proteins
- proteins to make progeny - enzymes for genome replication - proteins to interfere with host immune defences
53
on which characteristics are viruses classified?
- type of nucleic acid in genome - polarity of genome - replication method
54
stages of the infectious viral cycle
- attachment - penetration - uncoating - replication - assembly - release
55
why are viral infections prevalent, persistent and problematic?
- few effective drugs due to resistance and innovation problems - high mutagenic rates - public health issues e.g. sanitation, decreasing vaccine uptake - latent and persistent infections - non-human carriers
56
influenza
- enveloped - spiked - ssRNA(-) - aerosol droplet transmission
57
norovirus
- naked - ssRNA(-) - enteric transmission
58
hepatitis C
- enveloped - ssRNA(+) - percutaneous transmission (small chance of mucosal and perinatal) - linked to HCC
59
HIV
- enveloped - ssRNA(+) retrovirus - percutaneous, mucosal and perinatal transmission
60
EBV
- type 4 HHV - enveloped - dsDNA - associated with Hodgkins lymphoma and Burkitts lymphoma - salivary transmission
61
methods of viral transmission
- respiratory: aerosol droplet, saliva - enteric - contact: mucosal, cutaneous - percutaneous: blood-borne, arboviruses - mother to child: congenital, perinatal - zoonoses: ingestion, bites