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CELLS (ORGANELLES (Golgi apparatus: packages, modifies and segregates…

CELLS

MEMBRANE TRANSPORT TYPES

ACTIVE TRANSPORT: Integral proteins moving substances against their concentration gradient, which requires the use of ATP

OSMOSIS: movement of water molecules (dependent on solute concentrations)

SIMPLE DIFFUSION: movement of small or lipophilic molecules (e.g. O2, CO2, etc.)

FACILITATED DIFFUSION: movement of large or charged molecules via membrane proteins (e.g. ions, sucrose, etc.)

ENDOCYTOSIS

 Pinocytosis: "cellular drinking,” the cell engulfs drops of fluid by pinching in and forming vesicles that are smaller than the phagosomes formed in phagocytosis

Phagocytosis, the cell engulfs a large particle, encloses around itself with phagosomes.

Receptor mediated endocytosis: receptor-mediated endocytosis is an extremely selective process of importing materials into the cell

NUCLEUS

surrounded by the nuclear envelope; controls the center of the cell and is responsible for transmitting genetic information

PLASMA MEMBRANE

Membrane made of a double layer of lipids where proteins are embedded. Serves as an external cell barrier

EXOCYTOSIS

materials are exported out of the cell via secretory vesicles

CYTOPLASM

Cellular region between the nuclear and plasma membrane. Consists of cytosol an organelles