BSCI 207 Midterm: Unit 4 Study Guide
17 Dec 2015
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One body part (limbs, head, tongue, heart) Force is applied against a stationary object. External media = soil, water, and air: types of filament protein: Microfilaments: bundles of actin protein monomers strung together to form a filament, help entire cell or cell parts to move, also determine and stabilize cell shape. Intermediate filaments: anchor cell structures in place, such as the nucleus. They also resist tension and maintain rigidity by extending through cytoplasm and connected membrane structures (desmosomes) Microtubules: thickest filament among the three measuring 25nm in dia. They form the rigid internal skeleton for some cells or cell regions. Act as a framework along which motor proteins can move structures within the cell. Separates chromosomes in meiosis: motor proteins: protein that causes movement within a cell. Usually two elongated subunits, with smaller subunits attached to one end (the head region). Types of motor proteins and their associated filaments: Myosin actin(microfilament) (most move to + end)
