Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Dr. Brasington 5/22/2017 The most basic living unit of the human body. Roughly 30-75 trillion cells with common architecture. Divided into 3 main parts: Plasma membrane: envelopes the entire cell Cytoplasm Nucleus 2 3 Large structure, usually found in the center of the cell, composed of double membrane that contains nucleic acids. Contains DNA, regulates protein synthesis and cell division. Also contains RNA. 4 5 Allow the transport of water soluble molecules across the nuclear membrane: i.e.: RNA and ribosomes. 6 7 Small spheres containing RNA and proteins. **The site of RNA synthesis** 8 9 Threadlike material composed of DNA and protein.(Red lines in diagram and lab models.) Found throughout the nucleoplasm. Contains the genes which control protein synthesis. 10 Chromatin 11 Envelopes entire cell, separating the intracellular space from the extracellular space. Lipid bilayer with peripheral proteins attached and integral proteins extending through the membrane. 12 13 14 Mixture of water, salts, and organic molecules combined to form a thick fluid and organized structures called organelles. Region between plasma membrane and nucleus. Cellular metabolism and other activities that maintain the cell. 15 16 Branching tubules without ribosomes. Winds and twists through cytoplasm. **Site of lipid and carbohydrate assembly.** 17 Branching tubules with attached ribosomes. Extends between nucleus and plasma membrane. **Site of protein synthesis.** 18 19 20 Very small, spherical structures composed of 60% RNA and 40% protein. Either attached as RER or free floating in the cytoplasm. Provide attachment sites for mRNA during protein synthesis. 21 22 “Power house” of the cell. Spherical or sausage- shaped with inner folded membrane. Found randomly throughout cytoplasm. Site where nutrients are broken down and ATP is produced during cellular respiration. 23 24 25 Series of flattened, disc-shaped sacs; “stack of pancakes”. Usually near nucleus with secretory vesicles near plasma membrane. Prepares and packages cellular products for transport. 26 27 28 Small, spherical vesicles randomly spread throughout the cytoplasm. Contains enzymes that breakdown materials brought into cell, or releases enzymes out of cell. 29 30 Composed of 9 groups of 3 microtubules in cylindrical form. Near the nucleus in the centrosome. Participate in cell division by forming the mitotic spindle. 31 32