Anatomy & Physiology I and II

Anatomy & Physiology Study Guide three forms: receptor-mediated endocytosis, pinocytosis, or phagocytosis. The ejection of materials from the cytoplasm is accomplished by exocytosis. The transmembrane potential results from the unequal distribution of ions across the plasma membrane: • The potential difference, measured in volts, between the two sides of a plasma membrane is the transmembrane potential. The transmembrane potential is the cell’s resting potential. Stages of a cell’s life cycle include interphase, mitosis, and cytokinesis: • Cell division is the reproduction of cells. Apoptosis is the genetically controlled death of cells. Mitosis is the nuclear division of somatic cells. Sex cells are produced by meiosis. • Mitosis proceeds in four stages: prophase, metaphase, anaphase, and telophase. • During cytokinesis, the cytoplasm is divided, and cell division ends.

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