Biología Flashcards

1
Q

¿Cuánto mide la piel?

A

1.85 m2

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2
Q

¿Cuánto pesa la piel?

A

4,200 gramos; 6% peso total

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3
Q

Espesor de la piel

A

2.2 mm

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4
Q

Porcentaje de sangre que llega a piel

A

30% (1,800 cm3)

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5
Q

Fase anágena

A

Crecimiento del cabello (2-5 años)

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6
Q

Fase catágena

A

Fase intermedia (2-5 semanas)

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7
Q

Fase telógena

A

Pérdida de cabello (2-5 meses)

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8
Q

Capas epidermis

A
Córneo
Transicional
Granuloso
Espinoso
Basal
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9
Q

Tiempo de paso queratinocito por las capas

A

15 días

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10
Q

Cicatriz hipertrófica

A

Respeta bordes

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11
Q

Cicatriz queloide

A

No respeta bordes

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12
Q

¿Para cuánto queratinocitos transfiere melanosomas el melanocito?

A

36 queratinocitos

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13
Q

Melanosoma

A

Conjunto de gránulos de melanina

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14
Q

¿De qué depende el color de la piel?

A

De los melanosomas

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15
Q

Células de Langerhans

A

Dendríticas, presentadoras de antígenos

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16
Q

Células de Merkel

A

Mecanorreceptores tipo 1
Sensibilidad táctil
Complejo células de Merkel - axón
Gránulos

17
Q

Capas lámina basal

A

Lúcida

Densa

18
Q

Desmosoma

A

Unión queratinocito- queratinocito

19
Q

Hemidesmosoma

A

Unión queratinocito - lámina basal

20
Q

Fibroblastos

A

Esqueleto estructural
Síntesis y degradación proteínas
Actividad proliferativa y sintética de cicatriz

21
Q

Mastocitos

A

IgE
Histamina
Hipersensibilidad Tipo I

22
Q

Leptina

A
En adipocitos 
Aislante
Reservorio energético 
Amortiguador (buffer)
Protector
Estético