HOOFDSTUK 31 Flashcards

thermoregulatie

1
Q

koudbloedigen

A

poikilothermen
= T wordt geregeld door omgeving

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2
Q

warmbloedigen

A

homeothermen
= T wordt geregeld door organisme zelf

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3
Q

warmte afgifte door de huid

A
  • radiatie
  • conductie
  • convectie
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4
Q

radiatie

A
  • omgevingsafhankelijk
  • geen transportmedium
  • stralingswarmte 60%
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5
Q

conductie

A
  • omgevingsafhankelijk
  • warmtegeleiders
  • lucht is slecht geleidend
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6
Q

convectie

A
  • omgevingsafhankelijk
  • warmte wordt meegetrokken door fluidum
  • ventilator
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7
Q

homeostase van lichaamstemperatuur (sensor, controle centrum?)

A
  • sensor = dendrieten in de huid en hypothalamus
  • controle centrum = hypothalamus
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8
Q

wat gebeurt er bij te lage temperatuur?

A
  • ril-reflex
  • zweetreflex stopt
  • weerstandsvaten ondervinden vasoconstrictie
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9
Q

wat gebeurt er bij te hoge temperatuur

A
  • ril-reflex stopt
  • weerstandsvaten open
  • zweetreflex activatie
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10
Q

koorts vs hyperthermie?

A

koorts = controle centrum is ontregeld
hyperthermie = T is verhoogd maar setpoint blijft ongewijzigd

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11
Q

uitputting

A

centrale T > 39°C

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12
Q

stroke

A

centrale T > 41°C

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13
Q

dehydratatie?

A

= minder zweten

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14
Q

hypovolemie

A

= verminderde huidperfusie

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15
Q

hypoperfusie

A

= onvoldoende bloed voor organen, hersenen,..

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