MEMBRANA PLASMATICA Flashcards
Modelo de Mosaico Fluido
los componentes que estan flotando no son estáticos y hay movimiento
Componetes Membrana Celular
Bicapa foslipida
Colesterol
Proteinas Perifericas
Proteinas Integrales
Importancia bicapa de fosfolipidos
es antipática, permite que haya una separación entre el espacio intra y extra. celulares los fosfolipidos no estan estáticos, contribuyendo al modelo de mosaico fluido
Importancia de Colesterol
regulación de temperatura
Importancia de las Proteinas Perifericas
Actuar como enzimas o ayudar con la forma celular
se pueden unir a carbs
Importancia Proteinas Integrales
atraviesan la membrana
transporte de sustancias, por ejemplo, glucosa .
Simple Difusion
Requires no energy to pass molecules from one side of the membrane to another
Small molecules
from high concentration to low concentration, meaning following the preexisting concentration gradient
Facilitated Difusión
high to low
no energy requiered
in favor or the concentration gradient
uses proteins to move molecules inside or outside the membrane
Actve Transport
Transporte that goes in the contrary of concentration gradient
it requires energy
Endocytosis
Forming of vesicles that takes molecules inside of the cell
Phagocytosis
the cell stretches so that it can fit the vesicle inside
Receptor mediated endocytosis
the incoming substances bound themelves to receptors
Pinocytosis
it allows the cell to take in fluids
Exocytosis
taking things outside of the cell
It’s main role is to define the intra and extra celular space
cell membrane
Selective permeability
the cell membranes ability to exclude certain components to enter the cell
Parts of a Phosfolipid
head: phosphate group
skeleton: glycerol
tail: fatty acids
In between a non polar molecule and a heavily charged molecule , which one will probably pass easier
the non, small polar one
where can peripheral proteins be found
on the inside
where can lipid bound proteins be found
between phospholipid layers
Chanel Proteins
they act as sort of a passageway , that allow molecules to pass through
Example Channel Proteins
acuaporins
Carriers
they open and close to allow the molecule to get inside the cell
Example of carriers
GLUT4
Enzimas
they use ATP to move molecules against the concentration gradient
CAMP
cell adhesion molecules
Adherent Junction
ataches 2 cells togeather
Tight Junctions
extremely tight ,waterproof seal
Cells Surface Receptor
recieve sígnals
What is the purpose of the glycoproteins and glycolipids
that cell can recognize one another
Osmosis
type of facilitated diffusionm through osmotic pressure and channels+
Osmosis moves from
hypotonic side to hypertonic side
Primary transport
directly uses ATP and atpsas(enzymes)
Secondary Tranport
indirectly uses ATP
Antiport
diferentes directions
uses electrochemical gradient
Simport
same direction
Bulk Transport
endo and exo cytosine
Plasmolisis
celula vegetal en un medio hipersónico
Patologia Acuaporinas
diabetrd insipida nefrogena congenita
Ejemplo de Difusión Facilitada
isoformas: que actúan como transportadores facilitadores de glucosa
fosfolípido
2 ácidos grasos
Glicerol
Grupo fosfato
esfingolipidos
1 ácido graso
esfingosina
glicolípidos
Cerebrósido
Gangliósidos
esteroles
Grupo hidroxilo (única parte hidrofílica) se une a los fosfolípidos a
través de un puente de hidrógeno.
