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Transcript
Cytoplasm and Cytoskeleton Biology 4 Honors Grace Kor Mery Wang The Cytosol Fluid within the cell 70% of cell’s volume Contains cytoskeleton Cytosol + Organelles = Cytoplasm “cytoplasm matrix” What does cytosol do? site of metabolism for prokaryotes majority for eukaryotes glucose (mitochondria can’t use) → cytosol → pyruvate (mitochondria can use) waste is dissolved here protects lysosomes transports material The Cytoskeleton Reinforces the cell’s shape Made up of proteins: Microtubules, Microfilaments, Intermediate Filaments Present in both prokaryotic and eukaryotic cells Microtubules in the Cell Made of tubulin polymers “Tracks” on which organelles can navigate through the cell Found in centrosomes and centrioles Role in cell division Make up the inner structure of cilia and flagella in eukaryotic cells Intermediate Filaments Can be made of a variety of proteins (keratin) Cell’s support structure Specialized in bearing tension “Sturdy” Functions in the anchoring of the nucleus and other organelles Microfilaments thread-like protein fibers composed of actin (contractile protein) responsible for muscle contraction carry out cellular movement (gliding, contraction, cytokinesis)