Transporte de gases Flashcards

1
Q

Presion alveolar de O2

A

109 mmHg

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2
Q

Presion alveolar de CO2

A

40mmHg

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3
Q

Presión de O2 en el ambiente

A

159mm

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4
Q

Presion de Co2 en el ambiente

A

0.23mm

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5
Q

3 caracteristicas de los gases

A
  • Todo gas ocupa un volumen
  • Ejerce una presión
  • Posee temperatura
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6
Q

Contenido gaseoso normal del alveolo en reposo

A

volumen crítico

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7
Q

concentración normal de O2 en el aire

A

21%

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8
Q

si hay más altura hay _____

A

menos presión

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9
Q

Presion barometrica

A

760mmHg

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10
Q

Vapor de agua

A

47mmHg

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11
Q

Valor normal PaO2 arterias sistemicas

A

92mmHg

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12
Q

Valor normal PaCO2 arterias sistémicas

A

40mmHg

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13
Q

Coeficiente difusion O2

A

1

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14
Q

Coeficiente difucion CO2

A

20

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15
Q

Mas distancia =

A

menos difusion

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16
Q

El factor surfactante es secretado por

A

neumocitos tipo 2

17
Q

Fraccion inspirada de O2

A

21%

18
Q

Saturacion de O2

A

98%

19
Q

porcentaje O2 transportado en hemoglobina

A

97%

20
Q

Cuanto O2 transporta 1gr de Hemoglobina

A

1.34ml O2

21
Q

3 mecanismos de liberacion de CO2

A
  • Bicarbonato 70%
  • en el eritrocito 20%
  • En el plasma10%
22
Q

enzima encragada de la reaccion reversible entre H2CO3 (acido carbonico) y HCO3 + H

A

anidrasa carbonica

23
Q

Volumen corriente

A

6-8ml/kg

24
Q

Componentes que contribuyen al efecto Bohr

A

+ iones H
+ PCO2
+ 2-3 bifosfoglicerato
+ temperatura

25
Q

Cuantos mmHg se necesitan para saturar la hemoglobina al 50% de O2

A

27mmHg

26
Q

Un “SHUNT” es

A

zona fisiológica donde no hay intercambio correcto de gases