ORGANELLES
power HOUSE of the cell
M I T O C H O N D R I A
what are tight junctions
watertight seals between animal cells
what happens when you go against a concentration gradient, in terms of tonicity
the ion is moved against the concentration and will no longer be isotonic, depends on what you use but it creates an electrochemical gradient
what is the model of a cell membrane called
Fluid mosaic model
what is ATP for
provides energy for cellular functions
what organelle reads RNA? to create what?
ribosome, proteins
these help cells recognize each other
receptor proteins
a carrier protein that carries one molecule or ion
Uniporter
in the bilipid bilayer, lipids have a ---- hydrophilic head that interacts with the---- of the cell
polar, inside/outside
what kind of lipid is unsaturated at room temp
liquid
what sits on the outer layer of the nuclear envelope
rough endoplasmic reticulum
what is receptor mediated ednocytosis
substances getting selectively taken in
phagocytosis vs pinocytosis
phagocytosis uses vacuoles and engulfs large particles
pinocytosis uses vesicles and engulfs small particles
where are peripheral proteins found?
on the surface
does secondary transport use ATP? if not, what?
no, uses electrochemical gradient to move substances
what organelle synthesizes and metabolizes lipids
smooth endoplasmic reticulum
what do Glycoproteins do
bind to substances the cell needs to import
what is pumped in and out of the sodium potassium pump? what does this do to the cell?
2K+ goes in, 3Na+ goes out
this creates an electrical imbalance
what does cholesterol, temperature and phospholipid type do on the cell membrane
determine fluidity of model
form = function, form changes as a...
response to the environment
what is the purpose of the Golgi apparatus
Transport, modify, and package proteins and lipids into vesicles
describe microtubules, Microfilaments and Intermediate filaments
microtubules- Provide framework for motor proteins, tubulin
microfilaments- Determine & stabilize shape, transport
intermediate filaments- maintain shapes, Anchors organelles
do you need proteins for passive diffusion?
no! not needed
what does cholesterol do when the temp is hot vs cold
hot- prevents lipid melting
cold- prevents lipid solidifying
Polar amino acids located in the
outer lipid head region