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| responsible for the majority of the lipid bilayer |
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| the study of the structure and function of cells |
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| protiens found in plasma membrane act as receptors, chennels, transporters, exnymes, and cell identity markers |
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| protiens found in plasma membrane act as receptors, chennels, transporters, exnymes, and cell identity markers |
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| 2 basic ways substances move in and out of the cell |
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Definition
| passive movement and active transport |
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passive movement
solute moves down its concentration gradient. high concentration to a low concentration |
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| the net movement of water througha selectively permeable membrane |
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| cellular energy required to transport substances acrross the PM against a concentration gradient |
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| phagocytosis or pinocytosis. bringing large quantities INTO the cell |
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| large quantities of substances released OUT of the cell |
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intracellular fluid-protiens, ions, nutrients and waste products
site of many chemical reactions |
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| provides structure and integrity to cell |
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| use microtubules-direct chromosome movement during cell division |
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only in sperm, like cilia but longer
motility |
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| site of protein synthesis |
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network of folded membranes
rough er: where ribosomes are attached
smooth er: site of lipid synthesis |
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| powerhouse of the cell. generates ATP |
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synthesis and packing of secretions
directs final cellular products to specific destinations-intra or extracellular |
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Definition
| membrane enclosed vesicles containing digestive enzymes |
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Definition
contains the cell's genetic material: DNA
contains the nucleolus:specific genetic material RNA for ribosome synthesis
controls most cellular activities |
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