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Cell membrane
Cell membrane

... part. In addition, you’ll earn points for your class presentation, and the neatness and creativity you put into your work. You will present your model to the class on _____________. You will show the class your cell and then must be prepared to explain 2 of the organelles to the class – one that I p ...
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BIO 218 F 2012 CH 02 Martini Lecture Outline

... Cellular Anatomy Plasmalemma: Active processes Uses enzymes and carrier proteins Ion pumps use energy to transport charged particles such as Na+, Ca2+, Mg2+, K+ An ion pump that moves two ions simultaneously in opposite directions is called an exchange pump. ...
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... of the vacuole. The central vacuole also stores the pigments that color flowers. The central vacuole contains large amounts of a liquid called cell sap, which differs in composition to the cell cytosol. Cell sap is a mixture of water, enzymes, ions, salts, and other substances. Cell sap may also con ...
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... • Compare and/or contrast the structures found in plant cells and in animal cells. • Compare and/or contrast the structures found in prokaryotic and eukaryotic cells. • Describe how structures in cells are directly related to their function in the cell. • Explain the role of the cell membrane during ...
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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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