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GE 258 CH 3
| Question | Answer |
|---|---|
| material between plasma membrane and the necleus | cytoplasm |
| largely water with dissolved protein, salts, sugars, and other solutes | cytosol |
| metabolic machinery of the cell | cytoplasmic organelles |
| chemical substances such as glycosomes, glycogen granules, and pigment | glycosomes |
| provides most of the cell's ATP | mitochondria |
| site of protein synthesis | ribosomes |
| interconnected tubes and parallel membranes enclosing cisternae | Endoplasmic Reticulum |
| manufactures all secreted proteins | Rough ER |
| catalyzes reactions in various organs of the body (detoxification of drugs) | Smooth ER |
| functionsin modification, concentration, and packaging of proteins | golgi apparatus |
| spherical membranous bags containing diegestive enzymes | lysosomes |
| demolition crew | lysosomes |
| memberanous sacs containing oxidases and catalases | perioxisomes |
| detoxify harmful or toxics substances | perioxisomes |
| neutralize dangerous free radicals | perioxisomes |
| the "skeleton" of the cell | cytoskeleton |
| consists of microtubules, microfilaments, and intermediate filaments | cytoskeleton |
| dynamic strands of the protein actin | microfilaments |
| help form desmosomes (junctions between cell) | intermediate filaments |
| dynamic, hollow tubes made of the spherical protein tubulin | microtubules |
| determines the overall shape of the cell and distribution oforganelles | microtubules |
| dark-staining spherical bodies within the nucleus responsible for the production of ribosomes | nucleoli |
| composed of phingolipids and cholesterol | lipid rafts |
| are concentrating plateforms for cell-signaling molecules | lipid rafts |
| impermeable junction that encircles the cell | tight junctions |
| anchoring junction scattered along the sides of the cells | desmosome |
| a nexus that allows chemical substances to pass between cells | gap junction |
| anchors cells to the extracellular matrix | Cell Adhesion Molecules (CAMs) |
| assist in movement of cells past one another | Cell Adhesion Molecules (CAMs) |
| diffues nonpolar and lipid-soluble substances | simple |
| transport of glucose, amino acids, and ions | facilitated diffusion |
| total concentration of solute particles in a solution | osmolarity |
| how a solution affects cell colume | tonicity |
| solutions with the same solute concentration as that of the cytosol | isotonic |
| solutions having greater solute concentration than that of the cytosol | hypertonic |
| solutions having lesser solute concentration that that of the cytosol | hypotonic |
| ____ is valuable and less avaliable | K+ |
| Sodium-Potassium Pump: Net ratio | 3Na out of cell 2K into the cell |
| transport of large particles and macromolecules across plasma membranes | vesicular transport |
| moves substance from the cell interior to the extracellular space | exocytosis |
| enables large particles and macromolecules to enter the cell | endocytosis |
| threadlike strands of DNA and histones | chromatin |
| cell cycle contains ___ phases | two |
| two phases of cell cycle | 1. interphase 2. mitiotic phase |
| ___ untwists the double helix and exposes complementary strands | helicase |
| ___ uses RNA primers to begin DNA synthesis | replisome |
| ___ continues fromt he primer and covalently adds complementary necleotides to the template | DNA polymerase III |
| nuclear division | Mitosis |
| division of the cytoplasm | cytokinesis |
| phases of mitosis | 1. propase 2. metaphase 3. anaphase 4. telophase |
| formed in late anaphse by contractile ring | cleavage furrow |