6 curs home term
DESCRIPTION
MedicinaTRANSCRIPT
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04/22/23 1
Fiziopatologia homeostazei termice
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04/22/23 2
Variatiile zilnice ale temperaturii corpului
36.236.336.436.536.636.736.836.937.037.137.237.337.437.537.6
7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7
Stare de veghe - activitate fizica Perioada de somn
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04/22/23 3
Variatiile temperaturii in functie de locul de detreminare
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04/22/23 4
Variatii ale temperaturii corpului modificari ciclice hormonale
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04/22/23 5
Mentinerea constanta a temperaturii
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04/22/23 6
MECANISME DE TERMOGENEZĂ
– Reacţii chimice ale metabolismului,– Tonusul şi contracţia musculară,– Termogeneza chimică,– Mecanisme voluntare.
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04/22/23 7
MECANISME DE TERMOLIZĂ
• Radiaţia,• Conducţia,• Convecţia,• Evaporarea,• Vasodilataţia periferică,• Scăderea tonusului muscular,• Creşterea frecvenţei
respiratorii,• Mecanisme voluntare.
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04/22/23 8
Controlul hipotalamic al termoreglarii
Termoreceptori periferici
Termoreceptori centrali
HIPOTALAMUS
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04/22/23 9
Expunerea la temperaturi scazute
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04/22/23 10
Expunerea la temperaturi crescute
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04/22/23 11
Adaptarea la temperaturi scazute
• Calea neuroendocrina,• Calea nervos vegetativa,• Calea nervos centrala.
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04/22/23 12
Calea neuro-endocrina
Hipotalamus TSH-RH
Hipofiza anterioara
TSHTiroida
T4 Suprarenala
EPINEFRINA
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04/22/23 13
Calea nervos vegetativa
HIPOTALAMUS
SNV - simpatic
• Stimularea corticosuprarenalei,
• Cresterea tonusului muscular,
• Initierea frisonului,
• Reducerea secretiei sudorale.
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04/22/23 14
Calea nervos centrala
HIPOTALAMUS
SCOARTA
Mecanisme voluntare
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04/22/23 15
Adaptarea la temperaturi crescute
• Calea neuroendocrina,• Calea nervos vegetativa,• Calea nervos centrala.
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04/22/23 16
Calea neuro-endocrina
•Este inchisa
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04/22/23 17
Calea nervos vegetativa
HIPOTALAMUS
SNV - parasimpatic
• Vasodilatatie,
• Scaderea tonusului muscular,
• Cesterea secretiei sudorale.
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04/22/23 18
Calea nervos centrala
HIPOTALAMUS
SCOARTA
Mecanisme voluntare