4. Please match each of the following structures with its corect description/fun

Question

4. Please match each of the following structures with its corect description/function. (4 pts) Tropomyosin Titin Myosin Troponin Sarcoplasmic reticulum T-tubules z-dise Triad main protein of the thick filament, head has two binding sites-one binds actin proteins, the other binds and cleaves ATP long, filament protein covering the myosin-binding sites on each actin molecule of the thin filament main protein of the thin myofilament, each individual protein has a high affinity binding site for myosin protein control protein on the thin filament attached to tropomyosin. When Ca"is bound, it changes shape -which removes the blockade. a. b. c. c elastic filament that anchors the thick myofilaments to the Z-disc complex of f. extensive membranous network in a muscle cell that stores Ca until signaled to g. main anchoring proteins of the sarcomere-all myofilaments anchor to this proteins release it. Contains constitutively active Ca pumps always on, always pumping complex of proteins. protein found in the exact middle of the sarcomere in the "M-line" that serves to help anchor thick myofilamenets extensive invaginations of the sarcolemma, closely associated with the terminal cisternac of the SR- plays a key role in the release of Ca i. j. consists of T-tubules and terminal cisternae of the SR, region where Ca is released when wave of depolarization is present

Explanation / Answer

Tropomyosin - B
Titin - E
Myosin - A
Troponin - D
Sacroplasmic reticulum - F
T-tubules - I
Z-disc - H
Triad - J

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