Transport of sodium and chloride Flashcards

1
Q

Solvent drag

A

Bevægelse af vand transcellulært kan drive transport af andre stoffer

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2
Q

Transporter i PT

A
Apikalt:
Na-driven cotransporter
NHE3
BL:
NBC, Na-K, K-kanal
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3
Q

Transporter i TAL

A

NKCC2
NHE3
K-kanal
Na-K, K-kanal, Cl-kanal, HCO3-Cl antiporter

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4
Q

Transporter i DCT

A

NCC

Na-K, K-kanal, Cl-kanal

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5
Q

Transporter i CD

A

ENac
K-kanal
Na-K, K-kanal

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6
Q

Hvad inhiberer NKCC2 og hvor

A

Loop diuretika. TAL

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7
Q

Hvad inhiberer NCC og hvor

A

Thiazid. DCT

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8
Q

Hvad inhiberer ENac

A

Amilorid. CD

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9
Q

ANGII virkning

A

PT: binder AT1 receptor => adenylyl cyklase => øget NHE3

Øget Na reabsorbtio

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10
Q

Aldosteron virkning

A

MRs => transkriptions faktor

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11
Q

Hvordan øges specificiteten af MRs

A

11beta-HSD2 som omdanner cortisol til cortison

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12
Q

MRs hæmmere og udfald

A

glycerrethinic acid => øget Na tilbageholdelse => hypertension

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13
Q

AVP virkning

A
V2 receptor (BL) => Gs => cAMP => PKA => Na reabsorbtion og øget AQP2 syntese og exocytose
Øger vandoptag i CD
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14
Q

ANP virkning

A

receptor guanylyl cyklase => cGMP => vasodilatering => øget GFR => nedsat Na reabsorbtion

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15
Q

Prostaglandin/bradykinin virkning

A

PKC => inhiberet Na reabsorbtion

Hæmmer AC stimuleret af AVP

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16
Q

Hvordan påvirker amilorid K transport i CD

A

normalt er CD lumen negativ med ved at blokere ENaC bliver den lumen positiv og dermed kan transporten af K ikke drives

17
Q

Hvordan transporteres Cl i CD

A

principial celler: drives af det negative transepiteliale spænding - paracellulært
beta-intercalated celler: Cl-HCO3-exchanger