Nucleus - Has gaps/pores for Nucleic acids to pass. Contains a chromatin network which becomes chromosomes during division. Controls nearly all activities in the cell, Nucleolus - Smaller sub-unit that contains Ribonucleic acid (RNA), within the nucleus, Nuclear Envelope - Surrounds the nucleus keeping it's contents secure, Golgi Apparatus - Packages proteins for delivery to other organelles. Also produces lysosomes, Centrioles - Two of these in every cell, which are found near the nucleus as they are involved in cell division, Lysosomes - Produced by the Golgi Apparatus, contain enzymes to destroy waste. Can actually destroy the contents of an entire cell., Rough ER - Form passageways to different parts of the cell; studded with ribosomes and makes cell proteins. , Smooth ER - Forms passageways for transportng materials to and from different parts of the cell. Involved in the metabolism of lipids and fats., Mitochondria - Respiration occurs here, releasing ATP from sugar and oxygen. The ATP becomes ADP, and the removal of a phosphate group., Ribosomes - Contain different forms of RNA, and manufacture proteins such as enzymes and hormones., Cytoplasm - Likened to a gel, where many chemical reactions take place. , Cell membrane - Phospholipid bilayer; phosphate head is hydrophillic, lipid tail is hydrophobic. This is semi-permeable, with 'channel proteins' to allow substances in.,

Cell Ultrastructure Functions

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