1.2. y 1.4. Membrana plasmática y potencial electroquímico Flashcards

1
Q

Composición de la membrana

A
  • 55% proteínas
  • 25% fosfolípidos
  • 13% colesterol
  • 4% otros (esfingolípidos)
  • 3% carbohidratos
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2
Q

Célula con mayor cantidad de esfingolípidos

A

Célula de Schwann

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3
Q

Tipos de proteínas de membrana

A

Integrales → canales, transportadores, receptores, enzimas
Perifericas → enzimas o reguladoras de las proteínas integrales

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4
Q

Difusión simple

A

Poros
Canales iónicos

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5
Q

Osmolaridad plasmática

A
  • Osmolaridad = 2 x Na + (BUN/2.8) + (glucosa / 18)
  • Osmolaridad = 2 x Na + (glucosa / 18) + (Urea x 6)

280 - 295 rango normal de osmolaridad

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6
Q

Iones que establecen el PMR

A
  • Na+
  • K+
  • Cl-
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7
Q

Ecuación de nerst

A

Potencial de equilibrio de un ion

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8
Q

Ecuación de Goldman-Hodgkin-Katz

A

Potencial de equilibrio de Na+, Cl- Y K+

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9
Q

Ion con mayor permeabilidad

A

K+

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10
Q

Exocitosis NT

A

Complejo SNARE → SNAP-25, Sintaxina y sinaptobrebina → Unión de la vesícula a la membrana
Sinaptotagmina + Ca2+ → Exocitosis contenido vesícula

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