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Cell Membrane - Ms. Peterschick`s Classroom
Cell Membrane - Ms. Peterschick`s Classroom

... through a cell membrane much more quickly than they should. How does this happen? ◦ Protein channels act as carriers, making it easy for certain molecules to pass. ◦ Red blood cells have membrane proteins with carrier channels that allow glucose to pass through them. Only glucose can pass through he ...
Cell Organelles
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... membrane-bound vesicles and tubules - called the endoplasmic reticulum (ER). The smooth endoplasmic reticulum is so named because it appears smooth by electron microscopy. Smooth ER plays different functions depending on the specific cell type including lipid and steroid hormone synthesis, breakdown ...
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... The Mitochondria are the energy source (ATP) that fuels all the activities of the cell. In a factory, the mitochondria could be a generator or some type of an electrical source. In a school it could be the lunch room, or perhaps the electricity supplying the computers and all the technology in a sch ...
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... shape to plant cells; a rigid, non-living structure made of complex starch (cell walls are a major source of fiber). ...
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... packaging and distribution center of the cell. Modified proteins are enclosed in new vesicles that bud from the surface of the Golgi apparatus Some of these vesicles include lysosomes, which are small, spherical organelles that contain the cell’s digestive enzymes. Here’s how the ER, Golgi apparatus ...
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... Description: Galectin-3 is a member of the family of animal lectins, which selectively binds beta-galactoside residues. This protein is secreted from cells by ectocytosis, which is independent of the classical secretory pathway through the endoplasmic reticulum/Golgi network. Galectin-3 has been ass ...
cell organelle WS 2014
cell organelle WS 2014

... sunlight and gives plants their green color 8. Digests excess or worn-out cell parts, food particles and invading viruses or bacteria 9. Provides temporary storage of food, enzymes and waste product 10. Firm, non-living, protective structure that gives the cell its shape in plants, fungi, most bacte ...
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...  Chemical constituents of cell - Carbohydrates, lipids, proteins, nucleic acids, water, inorganic ions  Structure of cell - Cell membrane, mitochondrion, endoplasmic reticulum, Golgi apparatus, lysosome, centrioles, nucleus, chloroplast, vacuole, cell wall, microtubule and microfilament  Comparis ...
CELL ORGANELLES
CELL ORGANELLES

... Ribosomes – Smallest and most numerous of the organelles - site of protein synthesis - located on rough endoplasmic reticulum or floating freely in the cytoplasm Rough Endoplasmic Reticulum – covered with ribosomes (ex. in pancreas) - newly synthesized proteins are modified, transported, and stored ...
CELL STRUCTURE AND FUNCTION BE PREPARED FOR THE
CELL STRUCTURE AND FUNCTION BE PREPARED FOR THE

... What are cell membranes made of? PHOSPHOLIPIDS & PROTEINS How are membranes arranged? PHOSPHOLIPIDS make a BILAYER with POLAR HEADS FACING OUT and HYDROPHOBIC TAILS FACING IN Which molecule in cell membranes helps cells recognize “self”? ...
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Endomembrane system

The endomembrane system is composed of the different membranes that are suspended in the cytoplasm within a eukaryotic cell. These membranes divide the cell into functional and structural compartments, or organelles. In eukaryotes the organelles of the endomembrane system include: the nuclear membrane, the endoplasmic reticulum, the Golgi apparatus, lysosomes, vesicles, endosomes and the cell membrane. The system is defined more accurately as the set of membranes that form a single functional and developmental unit, either being connected directly, or exchanging material through vesicle transport. Importantly, the endomembrane system does not include the membranes of mitochondria or chloroplasts.The nuclear membrane contains two lipid bilayers that encompass the contents of the nucleus. The endoplasmic reticulum (ER) is a synthesis and transport organelle that branches into the cytoplasm in plant and animal cells. The Golgi apparatus is a series of multiple compartments where molecules are packaged for delivery to other cell components or for secretion from the cell. Vacuoles, which are found in both plant and animal cells (though much bigger in plant cells), are responsible for maintaining the shape and structure of the cell as well as storing waste products. A vesicle is a relatively small, membrane-enclosed sac that stores or transports substances. The cell membrane, is a protective barrier that regulates what enters and leaves the cell. There is also an organelle known as the Spitzenkörper that is only found in fungi, and is connected with hyphal tip growth.In prokaryotes endomembranes are rare, although in many photosynthetic bacteria the plasma membrane is highly folded and most of the cell cytoplasm is filled with layers of light-gathering membrane. These light-gathering membranes may even form enclosed structures called chlorosomes in green sulfur bacteria.The organelles of the endomembrane system are related through direct contact or by the transfer of membrane segments as vesicles. Despite these relationships, the various membranes are not identical in structure and function. The thickness, molecular composition, and metabolic behavior of a membrane are not fixed, they may be modified several times during the membrane's life. One unifying characteristic the membranes share is a lipid bilayer, with proteins attached to either side or traversing them.
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