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Intracellular calcium is a secondary messenger whose concentration can vary when the cell receives signals from outside
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The cytosolic compartmentThe nucleusThe plasma membraneThe Golgi apparatusThe extracellular matrixCell adhesionVesicular traffickingThe lysosomesApoptosis, a programmed cell deathThe peroxisomesTransport across cell membranes.The cytoskeletonMitochondriaThe endoplasmic reticulumThe cell cycleCellular communicationDNA structureMeiosisCytoplasmic mRNA.Free energy (ΔG)The eukaryotic cellThe chloroplastsThe ribosomesThe centriolesMitosis and its phasesMembrane receptors and signal transductionBiogenesis and renewal of organellesEndocytosis, phagocytosis and exocytosisTechniques for studying organellesCellular organization of prokaryotesCell differentiationGeneral cellular compartmentalizationCell junctionsCell polarity