Chapter 19 - Microfilaments and Intermediate Filaments

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Sarcomeres

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Biology

14 Terms

1

Sarcomeres

________ are what the organization of actin thin filaments and myosin thick filaments in skeletal muscle cells are called.

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2

CH domain family

The ________ is the main housing of many actin cross- linked proteins.

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3

ATP

The-) (end of actin filaments is polarized and has an exposed ________ binding site.

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4

G actin

When ________ is above Cc, filaments grow and when it is below Cc, then filaments depolymerize.

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5

external signals

The organization and assembly of the cytoskeleton can be induced through ________, and the internal of both G proteins and calcium can be induced as well.

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6

Contractile

________ bundles with primitive sarcomere like organization can be formed by actin filaments and myosin II in nonmuscle cells.

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7

Intracellular translocation of various membrane

________ limited vesicles along actin filaments are powered by myosins I, V, and VI.

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8

Critical concentration

________ (Cc) is the equilibrium of actin monomers and actin filaments.

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9

eukaryotic cells

Actin is a huge part of the cytoskeleton and is abundantly found in ________.

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10

Bacteria

________ and viruses can be moved and the shape of a cell can be changed through the regulated polymerization of actin.

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11

filaments of actin

The ________ are organized into networks and bundles divided by cross- linked proteins.

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12

Cell locomotion

________ occurs through actin polymerization and branching generated movement, adhesion structures assembly, and myosin II- mediated cortical contraction.

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13

Globular G actin

________ and F- actin are both subunits oriented in the same direction.

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14

Polymerization of G actin

________ and nucleation occur at the same time in cells, and once polymerization stabilizes the rates for the addition and loss of subunits becomes equal.

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