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CANCER BIOLOGY

Cell Membrane

QuestionAnswer
CELL MEBRANE -REGULATES IMPORT/EXPORT MATERIALS -FORMS BOUNDARY BTWN LIVING AND NON-LIVING WORLD -CONTRIBUTES TO CELL SHAPE & STRUCTURAL SUPPORT
ENDPLASMIC RETICULUM (ER) & GOLGI APPARATUS INTERACT TO SYNTHESIZE & DELIVER THE PHOSPHOLIPIDS & STEROIDS THAT FORM THE CELL MEMBRANE
VESICLES -ARE SMALL MEMBRANE-BOUND SACKS THAT TRANSPORT MATERIALS -FUSE W/THE MEMBRANE TO INCREASED ITS SIZE
PASSIVE TRANSPORT TRANSPORT OF PARTICLES VIA DIFFUSION OR FACILITATED DIFFUSION THROUGH CELL MEMBRANE
DIFFUSION OF HYDROPHOBIC PARTICLES SMALL NON-POLAR SUBSTANCES DIRECTLY ACROSS CELL MEMBRANE W/OUT ASSISTENCE
FACILITATED DIFFUSION POLAR/HYDROPHILIC SUBSTANCES THAT PASS THROUGH CHANNEL OR CARRIER PROTEINS & PROVIDES ENERGY TO CELL VIA DIFFUSION
DIFFUSION -TRANSPORT OF SUBSTANCES ACROSS CELL MEMBRANE FROM HIGH TO LOWER CONCENTRATION -PROVIDES ENERGY FOR SMALL HYDROPHILIC MOLECULES LIKE GLUCOSE TO BE TRANSPORTED ACROSS CELL MEMBRANE BY CARRIER PROTEINS
ACTIVE TRANSPORT PROTEINS REQUIRE ENERGY TO MOVE HYDROPHILIC SUBSTANCES ACROSS CELL MEMBRANE FROM LOW TO HIGHER CONCENTRATION
MULTI-DRUG RESISTANCE PROTEINS COMPLICATE CHEMOTHERAPHY
PHAGOCYTOSIS -CELLULAR EATING -TYPE OF ENDOCYTOSIS THAT ALLOWS THE UPTAKE OF FOREIGN INVADERS & FOOD PARTICLES I.E. AMOEBA ENGULFING BACTERIUM
PINOCYTOSIS -CELLULAR DRINKING -TYPE OF ENDOCYTOSIS THAT PERMITS CELLS TO UPTAKE EXTRA-CELLULAR FLUIDS CONTAINING FOOD MOLECULES & OTHER DISSOLVED SUBSTANCES I.E. VESICLES FORMING ARROWS IN A CELL LINING A SMALL BLOOD VESSEL (TEM)
ENDOCYTOSIS -an energy-using process by which cells absorb molecules (such as proteins) by engulfing them -large polar molecules that cannot pass through the hydrophobic plasma or cell membrane -opposite to endocytosis is exocytosis.
RECEPTOR-MEDIATED ENDOCYTOSIS ALLOWS CELLS TO UPTAKE SPECIFIC SUBSTANCES (LDL/IRON) IN A REGULATED MANNER -COATED PIT/VESICAL FORMS
-EXOCYTOSIS -EXPORTS MULTIPLE COPIES OF LARGE HYDROPHILIC SUBSTANCES INTO THE EXTRA-CELLULAR SPACE -VESICLES W/SUBT. FUSE W/CELL MEMBRANE TO RELEASE THEIR CONTENTS
Created by: dgira002
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