Whats in a cell
Transcript of Whats in a cell
Whats In a Cell
The Nucleus
Nucleus●The biggest organelle in any eukaryotic cell●Membranebound organelle●Communitcates with cytosol●Inside the nucleus is the DNA
The Nucleolus
●The nucleolus is inside the nucleus●Produces ribosomes which move out of the nucleus and onto the rough
endoplasmic reticulum and are used for protein
The cytosol and cytoplasm
●The cytosol is almost like our blood, its like soup where all the other ogranelles sit
●Where most of the cellular metabolism occurs ●Cytoplasm is the collective term for the cytosoll and all the other
organelles
The Centrosome and Centriole
●Area of cell where microtubles are produced●Centrosome is actually a pair of little organelles called centrioles ●Each centriole is a ring of 9 groups of fused microtubles
Golgi
●Membrane bound structure, only one membrane
●Stacked membarne vesicles used to transport macromolecules to other places in the cell
Lysosome
●Contain hydrolytic enzymes that are needed for intracellular digestion
●Carefully released into the vacuole around bacteria and serve to kill and digest those bacteria
Peroxisomes
●Responsible for protecting the cell from its own toxic hydrogen peroxide
●Oxidative enzymes in peroxisomes help break down the hydrogen peroxide into water and oxygen
Secretory Vesicle
●Cell secretions (hormones, neurotransmitters etc.) Are packaged into secretory vesicles at the golgi apparatus and then transported out of the cell
Cell Membrane
●Every cell is enclosed in a membrane
Mitochondrion
●Provides the cell with energy it needs to do everything e.g. move, divide, produces secretory products, contract etc.
Vacuole
●Is a membranebound sac that helps with intracellular digestion and helps to release waste products
Smooth Endoplasmic Reticulum
●Plays different roles depending on cell type●Includes lipid and steroid hormone synthesis,
break-down of lipid-soluble toxins in liver cells, and control of calcium release in muscle cell contraction
Rough Endoplasmic Reticulum
●Lots of ribosomes on its surface●Proteins synthesized gather in the reticulum to be
transported throughout the cell
Ribosomes
●Packets of RNA and protein that play a very important role to both eukaryotic and prokaryotic cells
●Site of protein synthesis
Cytoskeleton
●Helps maintain cell shape●Mostly important to maintain cell motility●Works with three primary protein filaments●- microtubles●- actin filaments●- intermediate fibers