ch10pt1.2

Question 1

Actin filaments

Answer 1

F-actin

Question 2

Globular actin

Answer 2

G-actin

Question 3

__-actin are twisted, linear rows of the protein __-actin

Answer 3

F, G

Question 4

The ____ ____ on actin bind to _____

Answer 4

active sites, myosin

Question 5

other than actin, thin filaments are made up of

Answer 5

nebulin, tropomyosin, troponin

Question 6

holds F-actin together

Answer 6

nebulin

Question 7

Double strand protein that lies on top of actin strand. Prevents actin–myosin interaction

Answer 7

tropomyosin

Question 8

globular protein binding tropomyosin to actin. Removes tropomyosin from actin when Ca2 binds.

Answer 8

troponin

Question 9

Have titin substructure that recoils after stretching.
Contains hundreds of twisted myosin subunits.

Answer 9

thick filament

Question 10

Tail that binds to other myosin molecules. Head made of two globular protein subunits that reach towards the nearest thin filament. Hinge connects head and tail.

Answer 10

Myosin

Question 11

Myosin heads during contraction form _____-_____ with actin.

Answer 11

cross-bridges

Question 12

Thin filaments of sarcomere slide toward M line, alongside thick filaments. Z lines move closer together and the width of A band stays the same. I band and H band gets smaller

Answer 12

sliding filament theory