ch2.2 cell structure

• cell theory: all organisms are made up of cells which are the basic unit of life and arise from pre-existing cells
• cell/plasma membrane: outer boundary of the cell that regulates the transport of materials
• cytoplasm: jelly like substance inside the cell and all the organelles suspended with in it
• cytosol: fluid part of the cytoplasm
• cytoskeleton: consists of microfilaments and microtubules that give cell shape and assists the movement of materials, organelles or the whole cell
• organelles: microscopic structures within the cell
• nucelus: control centre of the cell that contains genetic material
• nuclear membrane: separates the nucleus from the cytoplasm
• nuclear pore: gaps in the nuclear membrane that allows large molecules to enter and leave nucleus
• nucleolus: manufactures and stores RNA
• ribosome: amino acids join at the ribosomes to create proteins
• endoplasmic reticulum: used for transporting and storing materials (mainly proteins)
• lysosome: contains digestive enzymes able to break down substances and worn out organelles
• Golgi body: modifies proteins and packages them in vesicles for secretion from the cell
• mitochondria: site of aerobic respiration for energy production
• centrioles: pair of cylindrical structures involved in reproduction of the cell
• inclusions: substances that are not part of the cell structure but are found in the cytoplasm