potencial de acción pasos Flashcards

1
Q

paso 1

A

neuronas pre-sinapticas generan potenciales graduados despolarizantes a neuronas post sinapticas

despolarizacion (entrada de sodio)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

paso 2

A

al alcanzar potencial umbral canales de NA se abren y entran a la célula

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

paso 3

A

entrada de Na causa despolarizacion hasta llegar al potencial de equilibrio de +67 pero a los 35 los canales de desactivan

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

paso 4

A

se activan los canales de potasio de +35 a -70 hiperpolarizacion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

paso 5

A

se activa la bomba sodio potasio

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

periodo refractario absoluto

A

no se genera un segundo potencial ni aun con un estimulo intenso

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

periodo refractario relativo

A

se puede generar un potencial si sobrepasa el umbral debido a canales de Na

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

hiperpotasemia

A

+ potasio en la célula muy excitable

incapacidad del riñón de secretar K

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

hipopotasemia

A
  • potasio en la célula menos excitable

mucha capacidad del riñón de secretar K

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

propagación continua

A

sin mielina

+ lenta

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

propagación saltatoria

A

+ mielina

+ rapida

How well did you know this?
1
Not at all
2
3
4
5
Perfectly