Animal Cell Structure


Cells structure and function
gracie massamba
Flashcards by gracie massamba, updated more than 1 year ago
gracie massamba
Created by gracie massamba over 7 years ago

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Question Answer
Plasma Membrane Composed of a phospholipid bilayer, with proteins embedded in the layer. Function: the membrane is selectively permeable and regulates the transport of materials into and out of the cell. Separates cell contents from the outside environment
Cytoplasm Cytoplasm is a thick, gelatinous, semi-transparent fluid. Function: the cytoplasm maintains cell shape and stores chemicals needed by the cell for metabolic reactions.
Nucleus The nucleus is the largest organelle and is surrounded by a nuclear envelope. The envelope has nuclear pores which allow the movement of molecules through it. The nucleus contains chromatin. Function: the nucleus controls/regulates cellular activity and houses genetic material called chromatin, DNA and proteins, from which comes the instruction for making proteins.
Nucleolus Dense spherical structure in the middle of the nucleus. Function: the nucleolus makes RNA and ribosomes.
Rough Endoplasmic Reticulum (RER) Network of membrane bound flattened sacs called cisternae studded with ribosomes. Function: protein synthesis takes place on the ribosomes and the newly synthesized proteins are transported to the Golgi apparatus.
Smooth Endoplasmic Reticulum (SER) Network of membrane bound flattened sacs called cisternae. No ribosomes. Function: Responsible for synthesis and transport of lipids and carbohydrates.
Golgi Apparatus A stack of membrane bound flattened sacs. Function: Newly made proteins are received here from the rough ER. the Golgi apparatus modifies them and then packages the proteins into vesicles to be transported where they are needed.
Vesicles Small spherical membrane bound sacs with fluid inside. Function: Transport vesicles are used to transport materials inside the cell and secretory vesicles transport proteins that are to be released from the cell, to the cell surface membrane.
Lysosomes Small spherical membrane bound sacs containing hydroly
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